Question

equações do primeiro grau a) 2×+3=5-× b) 2×+5=4-× c) 3×-1=2×-6 d) 4+5×=-2×-1 e) 3×+6=4+2× f) 3+5×=4×-1​

Answer 1

Resposta:

a) 2×+3=5-×

2x+x=5-3

3x= 8

x= $\frac{8}{3}$

b) 2×+5=4-×

2x+x= 4-5

3x= -1

x= $\frac{-1}{3}$

c) 3×-1=2×-6

3x-2x= -6+1

x= -5

d) 4+5×=-2×-1

4+1 = -2x -5x

5= -7x

x=  $\frac{5}{-7}$

e) 3×+6=4+2×

3x-2x=4-6

x = -2

f) 3+5×=4×-1​

5x-4x= -1 -3

x = -4