Question

Resolva as equações : a) ×+×+×=78 b) 2×+3× +4= 189 c) 2×+ 3× + 4=189 d) 5× -4 -3× =-16 e) f)

Answer 1

Bom dia, vamos aos cálculos.

a) ×+×+×=78
3x = 78
x = 78/3
x = 26

b) 2×+3× +4= 189
5x = 189-4
x = 185/5
x = 37

c) 2×+ 3× + 4=189
5x = 189-4
x = 37

d) 5× -4 -3× =-16
2x = -16+4
x = -12/2
x = -6

Answer 2

a) x + x + x = 78

3x = 78
x = 78/3
x = 26
.
.
.
b) 2x + 3x + 4 = 189

2x + 3x = 189 - 5
5x = 185
x = 185/5
x = 37
.
.
.
c) 2x + 3x + 4 = 189


2x + 3x = 189 - 4
5x = 185
x = 185/5
x = 37
.
.
.
d) 5x - 4 - 3x = -16

5x - 3x = -16 + 4
2x = -12
x = -12/2
x = -6