1. 3/4a - 1/5a = -10 2. P/2 = p/7 - 10 3. 1/2 (4× -5 ) x +5 1/4 4. 3/4(x+3) = -1/2 (x - 1)

1. 3/4a - 1/5a = -10
15/20a - 4/20a = -10
11/20a = -10
a = -10×20/11
a = -200/11

2. p/2 = p/7 - 10
p/2 - p/7 = -10
7p/14 - 2p/14 = -10
5p/14 = -10
p = -10×14/5
p = -28

4. 3/4(x+3) = -1/2(x-1)
3/4x + 9/4 = -1/2x + 1/2
3/4x + 1/2x = 1/2-9/4
3/4x + 2/4x = 2/4 - 9/4
5/4x = -7/4
x = -7/4 × 4/5
x = -7/5