«Решение уравнений» –2 (3х + 4) + (6х + 8) = 4 (5х – 2) – (5х + 8). 8 (4 – 3у) – (7 – 2у)...

Question

«Решение уравнений»
–2 (3х + 4) + (6х + 8) = 4 (5х – 2) – (5х + 8).
8 (4 – 3у) – (7 – 2у) = – (6 + 3у) + 8 (у – 2)

Answer 1

–2 (3х + 4) + (6х + 8) = 4 (5х – 2) – (5х + 8)
-6х-8+6х+8=20х-8-5х-8
-6х+6х-20х+5х=-8-8+8-8
-15х=-16
х=16\15

8 (4 – 3у) – (7 – 2у) = – (6 + 3у) + 8 (у – 2)
32-24у-7+2у=-6-3у+8у-16
-22у-5у=-22-25
-27у=-47
у=47\27