Question

Solve the following equations by elimination method.
a) 3(a - 1) = 8
b) 42 + 4x = 11x​

Answer 1

$\huge\underline\red{Answer}$

$a) \: \: 3(a - 1) = 8 \\ 3a - 3 = 8 \\ 3a = 8 + 3 \\ 3a = 11 \\ a = \frac{11}{3} \\ \\ b) \: \:42 + 4x = 11x \\ 42 = 11x - 4x \\ 42 = 7x \\ 7x = 42 \\ x = \frac{42}{7} \\ x = 6$

Answer 2

$\huge\underline\mathcal\green{...Answer...}$

Refer to the attachment for your answer.