Question

Resolva as equações
A) 5x-1 =x
B) (3x+5).2 =4
C) -4y+8 =2-3y
D) 4y-5-1 =20

Answer 1

Resposta:

$A)\frac{1}{4}$

B) - 1

C) 6

$D)\frac{13}{2}$

Explicação passo-a-passo:

$A)\:5x-1=x\\5x-x=1\\4x=1\\\boxed {x=\frac{1}{4} }$

$B)(3x+5)2=4\\6x+10=4\\6x=4-10\\6x=-6\\x=-\frac{6}{6} \\\boxed{x=-1}$

$C)-4y+8=2-3y\\-4y+3y=2-8\\-y=-6\:.(-1)\\\boxed{y=6}$

$D)4y-5-1=20\\4y=20+6\\4y=26\\y=\frac{26:2}{4:2} \\\\\boxed{x=\frac{13}{2} }$

Answer 2

Resposta:

Explicação passo a passo:

B) - 1

C) 6

Explicação passo-a-passo: