Question

a) 2X+21+5X=-21

b) -5-6X=5X+2

c) X+2X+1+3=X 

oobg!!

Answer 1

$a)2x+21+5x=-21 \\ \\ 2x+5x=-21-21 \\ \\ 7x=-42 \\ \\ x= \frac{-42}{7} \\ \\ x=-6 \\ \\ \\ \\ b)-5-6x=5x+2 \\ \\ -6x-5x=2+5 \\ \\ -11x=7 \\ \\ x= -\frac{7}{11} \\ \\ \\ \\ c)x+2x+1+3=x \\ \\ x+2x-x=-1-3 \\ \\ 2x=-4 \\ x= \frac{-4}{2} \\ \\ x=-2$