Mathematics
Grade-7
Easy
Question
Solve 7(x + 3) < 5x + 13
- x>-4
- x < 17
- x<-4
- x > -17
The correct answer is: x>-4
7(x + 3) < 5x + 13
7x +21 < 5x +13
7x -5x < 13-21
2x < -8
Divided each side by 2, 2 is a positive no. so inequality sign will not change
X < -4
when we multiply or divide by a negative number inequality sign will change
Related Questions to study
Mathematics
Solve:
3(x - 2) < 2(x + 9)
Solve:
3(x - 2) < 2(x + 9)
MathematicsGrade-7
Mathematics
Solve -2 (x+2) < 12
when we multiply or divide by a negative number inequality sign will change
Solve -2 (x+2) < 12
MathematicsGrade-7
when we multiply or divide by a negative number inequality sign will change
Mathematics
Solve 30b + 53 ≥ 18b – 83
Solve 30b + 53 ≥ 18b – 83
MathematicsGrade-7
Mathematics
Solve 55c + 13 ≤ 75c + 39
Solve 55c + 13 ≤ 75c + 39
MathematicsGrade-7
Mathematics
Solve 6(n + 2) < -72
Solve 6(n + 2) < -72
MathematicsGrade-7
Mathematics
Solve -4x -7 ≥ 21
Solve -4x -7 ≥ 21
MathematicsGrade-7
Mathematics
Solve -2 (x+2) < 14
multiply or divide by a negative number it will change the sign of inequality
Solve -2 (x+2) < 14
MathematicsGrade-7
multiply or divide by a negative number it will change the sign of inequality
Mathematics
Solve for b.
2(b+1) +3≤7
Solve for b.
2(b+1) +3≤7
MathematicsGrade-7
Mathematics
Solve for g.
2(g+1) +2 <10
Solve for g.
2(g+1) +2 <10
MathematicsGrade-7
Mathematics
Solve for h.
3(h+1) <9
Solve for h.
3(h+1) <9
MathematicsGrade-7
Mathematics
Solve for w.
2(w+2) <6
Solve for w.
2(w+2) <6
MathematicsGrade-7
Mathematics
Dave has earned scores of 87, 81, 92, 88, and 83 on the first five of six math tests for the semester. He would like to finish the semester with a test average of at least 90. Find the score Dave needs to earn on the sixth test to achieve his goal.
Dave has earned scores of 87, 81, 92, 88, and 83 on the first five of six math tests for the semester. He would like to finish the semester with a test average of at least 90. Find the score Dave needs to earn on the sixth test to achieve his goal.
MathematicsGrade-7
Mathematics
Solve -4x + 14 ≤ 54
multiply or divide by a negative number it will change the sign of inequality
Solve -4x + 14 ≤ 54
MathematicsGrade-7
multiply or divide by a negative number it will change the sign of inequality
Mathematics
Solve for y.
5(y+1)>10
Solve for y.
5(y+1)>10
MathematicsGrade-7
Mathematics
Solve 2(j+2) <10
Solve 2(j+2) <10
MathematicsGrade-7
