X+7=2x-8 -x+7=2x-8 3+y=2.7+4y 4y-1.8=-5y+3.6 2(x-4)=x-0.5 3(a+23)=4(a-4) (b++6)=3 6-(5+a)=67+(-7a-12) 0.3(x-2)-0.2(x+4)=-2.9 0.6(x+7)-0.5(x-3)=-6.8

x+7=2x-8

-x=-15

x=15

-x+7=2x-8

-3x=-15

x=-15/(-3)

x=5

3+y=2.7+4y

-3y=-0.3

y=-0.3/(-3)

y=0.1

4y-1.8=-5y+3.6

9y=5.4

y=5.4/9

y=0.6

2(X-4)=X-0.5

2x-8=x-0.5

x=7.5

3(A+23)=4(a-4)

3a+69=4a-16

-a=-85

a=85

(b+7)-(5b+6)=3

b+7-5b-6=3

-4b=2

b=2/(-4)

b=-0.5

6-(5+a)=67+(-7a-12)

6-5-a=67-7a-12

6a=54

a=54/6

a=9

0.3(x-2)-0.2(x+4)=-2.9

0.3x-0.6-0.2x-0.8=-2.9

0.1x=-1.3

x=-1.3/0.1

x=-13

0.6(x+7)-0.5(x-3)=-6.8

0.6x+4.2-0.5x+1.5=-6.8

0.1x=-12.5

x=-12.5/0.1

x=-125.