Question

me ajudem? só respondam se souberem pfv :)​

Answer 1

Resposta:

a) -3

b) 0

c) +5

d) +15

e) +5

Explicação passo a passo:

a)

              $3 + x = 0\\ x = 0 - 3\\ x = -3$

b)

             $23x+2=2\\\\23x= 2-2\\\\23x=0\\\\x = \frac{0}{23}\\\\x=0$

c)  

              $12 -7 +4x=25\\\\4x= 25-12+7\\\\4x= 20\\\\x = \frac{20}{4} \\\\x=5$

d)

              $5x-3x=30\\\\2x=30\\\\x = \frac{30}{2} \\\\x=15$

e)

             $4x+10=45-3x\\\\4x+3x=45-10\\\\7x=35\\\\x = \frac{35}{7} \\\\x= 5$