Maths-
General
Easy
Question
m + 2p = 24
m + p = 10
If (m1 p1) is the solution to the system of equations above, what is the value of p1?
The correct answer is: 6
Step by step explanation:
Given:
3m + 2p = 24
m + p = 10
Step 1:
Let,
3m + 2p = 24 —------ eq. 1
m + p = 10 —---------eq. 2
Step 2:
Now equate coefficient of p
∴ multiply equation 2 by 2
⇒ [m + p = 10] × 2
⇒ 2m + 2p = 20 —---- eq.3
Step 3:
Now subtract equation eq. 3 from eq.1
⇒ 3m + 2p = 24
- 2m - 2p = - 20
—--------------------
m = 4
Step 4:
Put m = 4 in equation 2
m + p = 10
4 + p = 10
p = 10 - 4
p = 6
∴ (m1 p1) = (4, 6)
Hence, the value P1 is 6.
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