i) x = -53/12
ii) x = 4
Step-by-step explanation:
i) 5(3x+4) - 2x =7x - 3(2x+11)
expand the parenthesis:
15x + 20 - 2x = 7x - 6x - 33
15x - 2x + 20 = 7x - 6x - 33
13x + 20 = x - 33
collect like terms:
13x - x = -33 - 20
12x = -53
divide both sides by 12:
x = -53/12
ii) 7x - (3x+5) -8 =(1/2)*(8x+20) -7x+5
7x - 3x - 5 - 8 = 8x/2 + 20/2 - 7x + 5
4x - 13 = 4x + 10 -7x + 5
4x - 13 = -3x + 15
collect like terms:
4x + 3x = 15 + 13
7x = 28
x = 28/7
x = 4