Question

c) -6x+7=17-8
d) 18x-5x=5-(-21)

Answer 1

$\displaystyle c).-6x+7=17-8 \\ -6x=17-8-7 \\ -6x=2 \\ x=- \frac{2}{6} \Rightarrow x=- \frac{1}{3} \\ \\ d).18x-5x=5-(-21) \\ 13x=5+21 \\ 13x=26 \\ x= \frac{26}{13} \\ x=2$