Question

2(x+1)+8=18
10*(x+7)-23<177

Answer 1

2(x+1)+8=18
2x+1+8=18
2x=9
x=9/2

10*(x+7)-23<177
10x+70-23<177
10x<177-70+23
10x<130
x<13

Answer 2

$\displaystyle a).2(x+1)+8=18 \\ 2x+2+8=18 \\ 2x=18-2-8 \\ 2x=8 \\ x= \frac{8}{2} \\ x=4 \\ b).10(x+7)-23\ \textless \ 177 \\ 10x+70-23\ \textless \ 177 \\ 10x\ \textless \ 177-70+23 \\ 10x\ \textless \ 130 \\ x\ \textless \ \frac{130}{10} \\ x\ \textless \ 13$