8MM Solving Linear Equations

• 24
• 2

• 14

• 10

Answer explanation

m = 2 x 12

• 8

• 11

• 16

• 4

Answer explanation

2y = 15 - 7
y = 8/2

• x = -4

• x = 15

• x = -5

• x = 16

Answer explanation

x - 10 = 2 x 3
x = 6 - 10

• x = 63

• x = 7

Answer explanation

3x - 4 = 34/2
3x = 17 + 4
x = 21/3

• t = 30
• t = 8

Answer explanation

4t - 24 = 3t + 6
4t - 3t - 24 = 6
t = 6 + 24
t = 30

• c = 18

• c = 10

Answer explanation

2c + 8 = 4 x 7
2c = 28 - 8
c = 20/2
c = 10

• y = -8

• y = 4

Answer explanation

y = -4(1/2) + 6
y = -2 + 6
y = 4

I think of a number, divide it by 5, subtract 7 and the result is 18. The number is:

• 5

• 18

• 25

• 125

Answer explanation

x/5 - 7 = 18
x/5 = 18 + 7
x = 25 x 5

The width of a rectangle is 6.5 cm and its perimeter is 27 cm. Its length is

• 21.5 cm

• 14 cm
• 7 cm

• 7.5 cm

Answer explanation

Perimeter of rectangle = 2L + 2W
27 = 2L + 2 x 6.5
2L + 13 = 27
2L = 27 - 13
L = 14/2
L = 7

• 5
• 7
• -5

• 8

Answer explanation

Make them the same denominator
4x - 2 = 3x + 3
4x - 3x - 2 = 3
x = 3 + 2
x = 5