Question

165x+143-162x-40 x=402

Answer 1

165x+143-162x-40 x=402

165x-162x-40x=402-143

-37х=259

х=259/(-37)= -7

Answer 2

165x+143-162x-40, при  x=402

165x-162x+143-40 при x=402

3x+103  при x=402

3*402+103=1309