Question

Resolva as seguintes equações do 1°grau com uma incógnita.
a)4x + 2=38

b)9x =6x +12

c)5x -1=3x+11

d)2x +8=x+13

e)5x -10=3(x+10)

f)3(2x -12)=4(x -10)

g)5(x -3)=10x +45

Answer 1

Resposta:

a) x = 9

b) x = 4

c) x = 6

d) x = 5

e) x = 20

f) x = -2

g) x = -12

Explicação passo a passo:

a) $4x+2=38$

$4x=36$

$x=9$

b) $9x=6x+12$

$3x=12$

$x=4$

c) $5x-1=3x+11$

$5x=3x+12$

$2x=12$

$x=6$

d) $2x+8=x+13$

$2x=x+5$

$x=5$

e) $5x-10=3\left(x+10\right)$

$5x-10=3x+30$

$5x=3x+40$

$2x=40$

$x=20$

f) $3\left(2x-12\right)=4\left(x-10\right)$

$6x-36=4x-40$

$6x=4x-4$

$2x=-4$

$x=-2$

g) $5\left(x-3\right)=10x+45$

$5x-15=10x+45$

$5x=10x+60$

$-5x=60$

$x=-12$