Question

a) 3x+9=x-3 b) 2 (x+3)=7 c) 25=16-x d) -2x+3=15 me ajudem por favor

Answer 1

a) 3x + 9 = x - 3

3x - x = -3 - 9

2x = -12

x = -6

b) 2 (x + 3) = 7

2x + 6 = 7

2x = 7 - 6

2x = 1

x = 1/2

c) 25 = 16 - x

x = 16 - 25

x = - 9

d) - 2x + 3 = 15

2x =3 - 15

2x = - 12

x = -6