Question

9. Solve the following equations
(a) 4 (m + 3) = 18 (b)-2(x + 3) = 5​

Answer 1

1) 4 (m + 3) = 18

${ \ value \ of \ m \ = \ 1.5}$

Step-by-step explanation:

${ \ Given, \ simple \ equation \ : \ 4 \ ( m+3) \ = \ 18}$

Divide both sides by 4 , we get

${ \ m+3 \ =}$ $\cancel\frac{18}{2}$

${ \ m+3 \ =}$ $\frac{9}{2}$

Subtract 3 , both sides , we get

m + 3 - 3 = 4.5 - 3

m=1.5

Therefore,

Value of m = 1.5

Verification:

Substitute m = 1.5 in given equation, we get

LHS = 4(1.5+3)

= 4× 4.5

= 18

= RHS.

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2) -2(x + 3) = 5

x+3 = $\frac{-5}{2}$

x= $\frac{-5}{2}$ - $\frac{-3}{1}$

x = $\frac{-5-6}{2}$

x= $\frac{-11}{2}$

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