Question

resolva a equação
a) 2× + 3 = 15
b) 7× - 1 = 13
c) 2× - 4 = 3
d) 4× + 2 = -18 ​

Answer 1

a) 2x+3=15
2x=15-3
2x=12
X=12÷2
X= 6

b) 7x-1=13
7x=13+1
7x=14
x=14÷7
x=2

c) 2x-4=3
2x=3+4
2x=7
x=7÷2
x=3,5

d) 4x+2=-18
4x=-18-2
4x=-20
x=-20÷4
x=-5