Question

2X+6=40
-2X+5X=15
4X+10=2X-10
-3+-8=-5X+12
-9X=-81
X+2=-2X+7
-12X=-72
-4X-2X=-36
-8X+14=-X
7X+2=2X+12​

Answer 1

Explicação passo-a-passo:

a) 2x+6=40

2x=40-6

2x=34

x=34÷2

x=17

b) -2x+5x=15

3x=15

x=15÷3

x=5

c) 4x+10=2x-10

4x-2x=-10-10

2x=-20

x= -20÷2

x= -10

d) -3+-8=-5x+12

-11= -5x+12

5x= 12+11

5x=23

x=23/5

e) -9x= -81

x=-81÷9

x= -9

f)x+2= -2x+7

x+2x=7-2

3x=5

x=5/3

g) -12x=-72

x= -72÷12

x= -6

h) -4x-2x=-36

-6x=-36

x= -36÷6

x= -6

i) -8x+14= -x

-8x+x= -14

-7x= -14

x= -14÷7

x= -2

j)7x+2=2x+12

7x-2x=12-2

5x= 10

x=10÷ -5

x= -2