Question

resolva as equacoes do 1 grau

a- 2x+1=11  b-3x+9=-3  c- 4x+5=x+20

Answer 1

Olá, boa tarde ☺

Resoluções:

a)

$a) \\ \\2x+1=11 \\2x=11-1 \\ 2x=10 \\ x= \frac{10}{2} \\ \boxed{x=5} \\ \\ b) \\ \\ 3x+9=-3 \\ 3x=-3-9 \\ 3x=-12 \\ x= -\frac{12}{3} \\ \boxed{x= -4 }\\ \\ c) \\ \\4x+5=x+20 \\ 4x-x=20-5 \\ 3x=15 \\ x= \frac{15}{3} \\ \boxed{x=5}$

Bons estudos :)