Question

Resolva as equações: a)4(x+1)=12 b)5(3-x)-4x=18 c)9x-3(2x+2)=15 d)2,5(x-2)-1,5x=1 e)3,5x+8=2(x+7) f)6(3x+2)-8=-2 g)-3(x-5)-2(2x+1)=-8

Answer 1

Boa noite

a) 4(x + 1) = 12 , x + 1 = 3, x = 2
b) 5(3 - x) - 4x = 18 , -9x = 3, x = -1/3
c) 9x - 3(2x + 2 ) = 15 ,  3x = 21 , x = 7
d) 2.5(x - 2) -1.5x = 1 , x = 6 
e) 3.5x + 8 = 2(x + 7) , 1,5x = 6 = x = 4 
f) 6(3x + 2) - 8 = -2 , 18x = -6, x = -1/3
g) -3(x - 5) - 2(2x + 1) = -8, -7x =-21 , x = 3