Question

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*5x+9=29
*5x-2=1-7x+12
*7-12x=-2
*3x-5=x+4
*7x-12=2x-15
*3x+2=11
*4x-9=-15-9
*10x=x-10
*x-1=-12
*12-7x=2+3x
*5x+2=x+10
*1+3x=2x+7
*2+7x=4-3x
*x-18=2x-3
*-5-2x-=3-8x-2

Answer 1

a) 5X+9=29

5X=20

X=4

5(4)+9=29

20+9=29

29=29

b)5X-2=1-7X+12

5X+7X=13+2

12X=15

X=5/4

5(5/4)-2=1-7(5/4)+12

6.25-2=1-8.75+12

4.25=1+3.25

4.25=4.25

c) 7-12x=-2

-12X=-9

X=3/4

7-12(3/4)=-2

7-9=-2

-2=-2

d) 3x-5=x+4

2x=9

x=9/2

3(9/2)-5=(9/2)+4

13.5-5=4.5+4

8.5=8.5

e) 7x-12=2x-15

5x=-3

x=-3/5

7(-3/5)-12=2(-3/5)-15

-4.2-12=-1.2-15

-16.2=-16.2

f) 3x+2=11

3x=9

x=3

3(3)+2=11

9+2=11

11=11

g) 4x-9=-15-9

4x=-15

x=-15/4

4(-15/4)-9=-15-9

-15-9=-24

-24=-24

h) 10x=x-10

9x=10

x=-10/9

10(-10/9)=(-10/9)-10

-11.11=-1.1-10

-11.11=-11.11

i) x-1=-12

x=-11

(-11)-1=-12

-12=-12

j) 12-7x=2+3x

-10x=-10

x=1

12-7(1)=2+3(1)

12-7=2+3

5=5

k) 5x+2=x+10

4x=8

x=2

5(2)+2=(2)+10

10+2=12

12=12

l) 1+3x=2x+7

x=6

1+3(6)=2(6)+7

1+18=12+7

19=19

m) 2+7x=4-3x

10x=2

x=2/10

x=1/5

2+7(1/5)=4-3(1/5)

2+1.4=4-0.6

3.4=3.4

n) x-18=2x-3

-x=15

x=-15

(-15)-18=2(-15)-3

-33 = 30-3

-33 = -33

o) -5-2x=3-8x-2

6x=6

x=1

-5-2(1)=3-8(1)-2

-7= -5-2

-7=-7