Question

a)3 + x = 0
b)23x+2=2
c)12-7+4x=25
d)5x-3x=30
e)4x+10=45-3x
resolva as equações ​

Answer 1

$a) \: 3 + x = 0 \\ x = - 3$

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

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

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

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