Question

34) 6х-(4х-5)=3х-4 35) 7(х+1)=5(2х-1) 36) 3(4-у)=9(3у+8) 37) -5(-х+3)=2(-х-4) решите пж

Answer 1

6х-(4х-5)=3х-4

6x-4x+5=3x-4

6x-4x-3x=-4-5

-x=-9

x=9

7(х+1)=5(2х-1)

7x+7=10x-5

7x-10x=-5-7

-3x=-12

x=4

3(4-у)=9(3у+8)

12-3y=27y+72

-3y-27y=72-12

-30y=60

y=-2

-5(-х+3)=2(-х-4)

-5x-15=-2x-8

-5x-2x=-8+15

-7x=7

x=-1