Question

solve15(x-1)+4(x+3)=2(7+x)​

Answer 1

1) 2^-3=1/2^x

=> 2^-3=2^-x

=> -3 = -x

=> x=3

2) 15(x-1)+4(x+3)=2(7+x)

=> 15x-15+4x+12=14+2x

=> 15x+4x-2x=14+15-12

=> 17x=17

=> x=1

That's all..