Question

1)5(x+1)-3(x+2)=0 2)13+4(2x-1)=5(x+2) 3)4(x+5)+3(x+5)=21

Answer 1

5(x + 1) - 3(x + 2) = 0
5x + 5 - 3x - 6 = 0 
2x - 1 = 0
2x = 1
x = 1/2
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13 + 4(2x - 1) = 5(x + 2) 
13 + 8x - 4 = 5x + 10
8x + 9 = 5x + 10
8x - 5x = 10 - 9 
3x = 1
x = 1/3
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4(x + 5) + 3 ( x + 5) = 21
4x + 20 + 3x + 15 = 21
7x + 35 = 21
7x = 21 - 35
7x = - 14
x = - 14/7
x = - 2