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Question

Find the value:
1. 7x - 5 = 2x
2. 5x - 12 = 2x - 6
3. 7p - 3 = 3p + 8

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Solution

1. 7x5=2x

7x52x=2x2x

7x2x5=0

5x5=0

5x5+5=0+5

5x=5

5x5=55

x=1

x=1

2. 5x12=2x6

5x122x=2x62x

5x2x12=2x2x6

3x12=06

3x12+12=6+12

3x=6

x=2

x=2

3. 7p3=3p+8

7p33p=3p+83p

7p3p3=3p3p+8

4p3=8

4p3+3=8+3

p=114

4p=11p=114


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