Year 9 Equations Revision

One-Step Equations

100

x-:17=3

x=51

200

v+15=34

v=19

300

r+8=-11

r=-19

400

-15=-6+x

x=-9

500

x-7=12

x=19

Two-Step Equations

100

-143=-8-9x

x=15

200

6x-1=-85

x=-14

300

x/3-7=-4

x=9

400

-7-9x=2

x=-1

500

-10-7n=-3

n=-1

Equations with Distribution

100

-8(7n+7)=-280

n=4

200

-6(7-4m)=126

m=7

300

3(5-4k)=111

k=-8

400

-6(4x+7)=102

x=-6

500

6(8x+4)=168

x=3

Equations with Variables on Both Sides

100

-6+x=-9-2x

x=-1

200

6-3b=-6b-12

b=-6

300

2n+7=-2+5n

n=3

400

1-4x=-7-5x

x=-8

500

3x-9=x+7

x=8

***Harder Equations

100

(5(m-1))/3=6

m=23/5 or 4.6

200

(x+5)/4=(x+4)/5

x=-9

300

(3y+2)/3=(2y+1)/4

y=-5/6

400

3(4-8p)=12-12p

p=0

500

(4k)/3-k/5=34

k=30