Question

Росить чистому ур-ий а) (23+3(x+y)=11 59-6x+ 7(x+3y) =0.​

Answer 1

1)23+3(x+y)=11.

23+3x+3y=11

3x+3y=11-23

3x+3y=-12

x+y=4

2)59-6x+7(x+3y)=0

59-6x+7x+21y=0

59+x+21y=0

x+21y=-59