X+(x+4)=22 (x-7)+x=33 1x+2x+3x=30 X+2x=45 3*(x-4)=1

Question

X+(x+4)=22 (x-7)+x=33 1x+2x+3x=30 X+2x=45 3*(x-4)=1

Answer 1

X+(x+4)=22

x+х+4=22

2х=22-4

2х=18

х=9

(x-7)+x=33

2х=33+7

2х=40

х=20

1x+2x+3x=30

6х=30

х=5

X+2x=45

3х=45

х=15

3*(x-4)=1

3х-12=1

3х=1+12

3х=13

х=13/3

х=4 1/3