Question

Помогите пж

1) 3(x+6)=x+2(x+9)
2) 2(8x-7)=18-4(5-4x)

Answer 1

$3(x+6)=x+2(x+9)\\3x+18=x+2x+18\\3x-2x-x=18-18\\0=0$

$2(8x-7)=18-4(5-4x)\\18x-14=18-20+16x\\18x-16x=18+14-20\\2x=12\\x=6$