1) А. 5x=10 x=10:5 х=2 б.2х-6=10 2х=10+6 2х=16 х=16:2 х=8 в.2х+х+2=20 3х=20-2 3х=18 х=18:3 х=6 г.4х-18=х 4х-х=18 3х=18 х=18:3 х=6 д.7x-3=2x+7 7х-2х=7+3 5х=10 х=10:5 х=2 е.3x-9=6+4x 3х-4х=9+6 -х=15 х=-15ж.8x+6=4x-2 8х-4х=-6-2 4х=-8 х=-8:4 х=-2 з.-2x-4=2x+16 -2х-2х=16+4 -4х=20 х=20:(-4) х=-5 2 задание а.22+5x=88+6x 5х-6х=88-22 -х=66 х=-66 б.-8x+45=-15-4x -8х+4х=-15-45 -4х=-60 х=-60:(-4) х=-15в.-3x-17=8x-105 -3х-8х=-105+17 -11х=-88 х=8г.21-3y=2(y+3) 21-3у=2у+6 -3у-2у=6-21 -5у=-15 у=3д.(2-x)+3(x-3)=-13 2-х+3х-9=-13 3х-х=-13+9-2 2х=-6 х=-3е.-3(1-3y)-12=12 -3+9у-12=12 9у= 12+12+3 9у=27у=3 3 задание а.-(7-3y)=8-8(2-y)-7+3y=8-16+8у 3у-8у=-16+7+8 -5у=-1 у=0.2б.2(x-3)+4=-5(2-2x) 2х-6+4=-10+10х 2х-10х=6-4-10 -8х=-8 х=1в.2x-4(x+7)=3(2-x) 2х-4х-28=6-3х 2х-4х+3х=28+6 х= 34г.1,26x+3,58=1,74+6,46 1.26х=1.74+6.46-3.58 1.26х=4.62 х=3.6д.0,88-(5,12+0,08y)=4,92y-y 0.88-5.12-0.08у=4.92у-у -0.08у-4.92у+у=5.12-0.88 -4у=4.24 у=-1.06