Question

solve $4(x + 9) = 6x - 4$. \
\
a) 3.2 \
\
b) 16 \
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c) 20 \
\
d) 6.5

Explanation:

Step1: Expand left-hand side

$4(x+9) = 4x + 36$

Step2: Rewrite the equation

$4x + 36 = 6x - 4$

Step3: Isolate x terms

$36 + 4 = 6x - 4x$

Step4: Simplify and solve for x

$40 = 2x$
$x = \frac{40}{2} = 20$

Answer:

C) 20