Maths-
General
Easy
Question
Solve the following by using the method of substitution
Y = X + 5
3X + Y = 13
Hint:
find x by substituting y (in terms of x) in the equation and find y by substituting value of x in the equations .
The correct answer is: x = 2 ; y = 7
Ans :- x = 2 ; y = 7
Explanation :-
⇒ y = x + 5 — eq 1
3x + y = 13 —- eq 2
Step 1 :- find x by substituting y = x + 5 in eq 2.
3x + (x + 5) = 13 ⇒ 3x + x + 5 = 13
⇒ 4x + 5 = 13 ⇒ 4x = 8
⇒ x = 2
Step 2 :- substitute value of x and find y
⇒ y = x + 5 ⇒ y = 2 + 5
∴ y = 7
∴ x = 2 and y = 7 is the solution of the given pair of equations
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