а)16-(2х+5)=30
16-2х-5=30
16-2х-5-30=0
-2х-19=0
-2х=19
х=-9.5
б)11у-(3у+12)=4(2у-3)
11у-3у-12=8у-12
11у-3у-12-8у+12=0
0=0
а)16-(2х+5)=30
16-2х-5=30
16-2х-5-30=0
-2х-19=0
-2х=19
х=-9.5
б)11у-(3у+12)=4(2у-3)
11у-3у-12=8у-12
11у-3у-12-8у+12=0
0=0