Question

Resolva as equações:
A)4x+16=14x+8

B)2(x-5)=-3(x-3)

C)x/2+x/3=7+2x/3

Com as contas,por favor!
Obrigada!

Answer 1

Resposta:

A) 4/5

B) 19/5

C) 42

Explicação passo-a-passo:

A) 4x+16=14x+8

4x-14x=8-16

-10x=-8

x=8/10=8:2/10:2=4/5 ou 0,8

S={4/5}

B) 2(x-5)=-3(x-3)

2x-10=-3x+9

2x+3x=9+10

5x=19

x=19/5 ou 3,8

S={19/5}

C) x/2+x/3=7+2x/3

x/2+x/3-2x/3=7

x/2+[(x-2x)/3]=7

x/2-x/3=7

(3•x-2•x)/(2•3)=7

(3x-2x)/6=7

x/6=7

x=7•6

x=42

S={42}