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Activities 7


7.1)

Solve the equations and check the answer:

a)
x 4 = 12
b)
x + 6 = 4
c)
2.3 x = 6.7
d)
2x 4.5 = 8.3
e)
3 5x = 12
f)
7 = 3x + 22
g)
3x + 5 = 1
h)
2x + 2 = 7
i)
x + 3 = 5
j)
4x 2 = 7
k)
2x + 3 = 3x + 2
l)
x 4 = 2x 1
m)
5x + 1 = x 3
n)
32x 24 = 5
o)
3x + 5 = 4 + 6x

a)
x 4 = 12
b)
x + 6 = 4
c)
2.3 x = 6.7
d)
2x 4.5 = 8.3
e)
3 5x = 12
f)
7 = 3x + 22
g)
3x + 5 = 1
h)
2x + 2 = 7
i)
x + 3 = 5
j)
4x 2 = 7
k)
2x + 3 = 3x + 2
l)
x 4 = 2x 1
m)
5x + 1 = x 3
n)
32x 24 = 5
o)
3x + 5 = 4 + 6x

7.2)

Solve the equations and check the answer:

a)
3x 20 = 4x 6
b)
5 + x = 3x + 7 4x
c)
2x + 3 4x 1 = 0
d)
2x 5 1 3 = 1
e)
3x 2 1 3 = 2x 3 + 4 3
f)
4 5 + 3x 5 = 2x x 15
g)
20 5x 2 = 10 + 6x 4
h)
4x 3 + 3x 4 = 50
i)
42 + 4x = x + 16

a)
3x 20 = 4x 6
b)
5 + x = 3x + 7 4x
c)
2x + 3 4x 1 = 0
d)
2x 5 1 3 = 1
e)
3x 2 1 3 = 2x 3 + 4 3
f)
4 5 + 3x 5 = 2x x 15
g)
20 5x 2 = 10 + 6x 4
h)
4x 3 + 3x 4 = 50
i)
42 + 4x = x + 16

7.3)

Solve the equations and check the answer:

a)
2 x = 3 5
b)
1 x + 2 3 = 4 3
c)
6 x = 2
d)
3 x + 1 = 10
e)
6x (4 3 x) = 1 x (5x2 + 8x)
f)
9 x + 4 x = 39
g)
6 x = 2 x + 28
h)
x (3 5 x) = 2x + 10

a)
2 x = 3 5
b)
1 x + 2 3 = 4 3
c)
6 x = 2
d)
3 x + 1 = 10
e)
6x (4 3 x) = 1 x (5x2 + 8x)
f)
9 x + 4 x = 39
g)
6 x = 2 x + 28
h)
x (3 5 x) = 2x + 10

7.4)

Solve the equations and check the answer:

a)
2x 3 + 7 2 = 2 4
b)
5x 6 + 14 = 32x
c)
2x + 3x 4 = 2
d)
5x + 1 4 = 2x
e)
16 = 2x 3
f)
4 = 7x 5
g)
2 = x 6 + 7
h)
4 = 2x 5 9

a)
2x 3 + 7 2 = 2 4
b)
5x 6 + 14 = 32x
c)
2x + 3x 4 = 2
d)
5x + 1 4 = 2x
e)
16 = 2x 3
f)
4 = 7x 5
g)
2 = x 6 + 7
h)
4 = 2x 5 9

7.5)

Solve the equations and check the answer:

a)
3(x 6) (10 x) = 30
b)
x + 11 = 10x 2(4x + 22)
c)
2x 3(4x 3) = 5(3x 3) + 4
d)
8(4x 3) = 2(x + 8)
e)
2(x + 3) = 5 (x 4)
f)
3x + 29 = 5x 8(7x 7)
g)
4(2x 5) (3x + 8) = (4x + 3) 2(3 + 6x)
h)
(x + 9) + 3(x + 7) = 10x + (2x + 6)

7.6)

Solve the equations and check the answer:

a)
3(x + 2) (x + 1) = 40
b)
x + 2(3 + x) 2(x 2) = 3(2x + 1)
c)
3x + 2 4 = 7
d)
x + 1 2 = 4x 3 5
e)
3x + 2 2 x = 15
f)
2 (x 3 2 ) (3x + 1 5 2 ) = 17x + 5 4 3x 4

You can find the solutions here.

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