1. (3х+у)-(-3-4у)= 2.(х+6у)-(6х-7у)=

Question

1. (3х+у)-(-3-4у)=
2.(х+6у)-(6х-7у)=

Answer 1

1. (3х + у) - (-3 - 4у) = 3х + у + 3 + 4у = 3х + 5у + 3
2. (х + 6у) - (6х - 7у) = х + 6у - 6х + 7у = (6у + 7у) - (6х - х) = 13у - 5х