# Solving equations - x on one side mainly ```=?
=?
=?
=?
=?
=?
8
14
20
12
14
13
15
12
=2
=4
=3
=1
=5
=6
8
14
20
12
14
13
15
12
Lesson Objective
Be able to write equations to describe problems
Be able to solve equations with the unknown variable on one side
Extend to look at solving equations with the unknown on both
sides
Look at the cards.
Match the think of a number problem to the correct
equation?
Tarsia Puzzle
Now can you find the number I was thinking of in
each statement?
Methods for solving equations:
Method 1 Using inverses
I think of a number times it by 3 and add 7. The answer is 40.
Method 2 Rearranging
I think of a number times it by 3 and add 7. The answer is 40.
1) 3x + 1 = x + 5
2) 2x + 2 = x +7
3) 4x + 1 = 2x + 9
4) 3x + 2 = x + 8
5) 3x + 1 = x + 4
6) 3x – 1 = x + 9
7) 2x - 1 = x + 7
8)
10) 3x - 1 = x + 7
11) 3x + 1 = 5x – 2
x + 2 = 2x – 1 9) 4x – 2 = x + 9
12) 3x – 2 = 5x + 1
1) 4x + 3 = 2x + 7
2) 3x + 2 = x + 7
3) 2x + 13 = 4x + 1
4) 5x – 2 = x + 8
5) 3x – 5 = x + 4
6) 2x + 10 = 4x + 9
7) x = 2x – 7
8)
10) x – 1 = 2x + 7
x + 2 = 3x – 1
11) 13x + 1 = 3x + 17
9) 5x + 2 = 14 – x
12) 4x – 4 = x + 1
```