Equation

One step equation

100

x+5=15

x=10

200

x/3=7

x=21

300

45=x-10

x=55

400

x² = 49

x=±7

500

3x² = 75

x² = 25

x=±5

Multi step equation

100

2x+3=13

2x=10

x=5

200

18 = 5x - 7 

5x=25

x = 5

300

30=-4x-2

-4x=32

x=-8

400

5 -5x/2= 25

-5x/2 = 20

-5x=40

x= -8

500

9a²-7=74

9a²=81

a²=9

a = ±3

Pronumeral on both side

100

x+1=2x-2

2x-x=1+3

x=4

200

1-k=3k-7

3k+k=1+7

4k=8

k=2

300

2u=7u-18

2u+7u=-18

9u=-18

u= -2

400

6x+4=22-3x

6x+3x=22-4

9x=18

x=2

500

7-9y=-3y+17

-9y+3y=17-7

-6y=10

y= -5/3

Brackets

100

Solve
3(x-4) =6

3x-12=6

3x=18

x =6

200

Solve
-4(x+5) = -4

-4x+20=-4

-4x=16

x=-4

300

5(2a+4)=2(4a−1)

10a + 20 = 8a + 2 

2a = -18

a=-9

400

2(x+4)+3(x−1)=6

2x + 8 + 3x - 3 =6

5x + 5=6

5x=1

x=1/5

500

-2(-3x-11)=5(7-4x)

6x+22=35-20x

6x+20x=35-22

26x=13

x=1/2

Worded question

100

The sum of 8 and the number n is 30

8+n = 30

200

The product of 4 and a is 24

4a=24

300

4 is subtracted from double the value x, the result is 10

2x-4=10

400

Calculate the width of a square if the length is 6cm and area is 48cm²

w= 8cm 

500

Calculate the length when a side of a square is 3x and the perimeter is 60m

3x+3x +3x+3x=60

12x=60

x=5