Question

Determine a solução das seguintes equações

a. 12x-16= -21+10x
b.10 (x+1)-5 (x-2)=70
c.x/4+20= x/3
d.x-10/9 + x/6=10

Answer 1

a. 12x-16= -21+10x

12x-10x = 16-21

2x = 5

x = 5/2

b.10 (x+1)-5 (x-2)=70

10x+10-5x-10 = 70

5x = 70

x = 14

c.x/4+20= x/3

x/4-x/3 = -20

(3x-4x)/12 = -20

-x/12 = -20

x = 20*12

x = 240

d.x-10/9 + x/6=10

(-20+3x)/18 = 10

3x/18 = 20/18+10

x/6 = 10/9+10

x/6 = (10+90)9

x/6 = 100/9

x = (100/9) * 6

x = 600/9

x = 200/3