Question

3 - Calcule as incógnitas abaixo.
a) 5x+10= 3x 40
b) 8+x=-5x+68
c) 2,5y-10=11+1,5y
d) -4,5-x=0,5x+1,5​

Answer 1

Resposta:

A)15, B)10, C)21, D)4

Explicação passo-a-passo:

A) 5X + 10= 3X + 40?

5X-3X=40-10

2X=30

X=15

B)8+X= -5X + 68

X+5X= 68-8

6X=60

X=10

C)2,5Y-10= 11+1,5Y

2,5Y - 1,5Y= 11+10

1,0Y=21

Y=21

D) -4,5-X= 0,5X+1,5

-4,5-1,5= 0,5X + X

-6,0= 1,5X

1,5X= -6,0

X= 4