Question

resolva bhaskara
3x-10+13=-2x+28 20x-30=40+30-20 -5x+45-89=-90+4 10x-20=40+50 20-80+2x=10
19+2x-13=10-20
10x-12+10=+18-20
13x-23-45=-7x+12

Answer 1

1) 3x - 10 + 13 = -2x + 28
3x + 2x = 28 + 10 - 13
5x = 38 - 13
5x = 25
x = 25/5
x = 5

2) 20x - 30 = 40 + 30 - 20
20x = 40 + 30 - 20 - 30
20x = 70 - 50
20x = 20
x = 1

3) -5x + 45 - 89 = -90 + 4
-5x = -90 + 4 - 45 + 89
-5x = -86 + 44
-5x = -42
x = -42/-5
x = 8,4

4) 10x - 20 = 40 + 50
10x = 40 + 50 + 20
10x = 110
x = 110/10
x = 11

5) 20 - 80 +2x = 10
2x = 10 - 20 + 80
2x = 10 + 60
2x = 70
x = 70/2
x = 45

6)19 + 2x - 13 = 10 - 20
2x = 10 - 20 - 19 + 13
2x = -10 - 6
2x =  -16
x = -16/2
x = -8

7)10x - 12 + 10 = 18 - 20
10x = 18 - 20 + 12 + 10
10x = -2 + 22
10x = 20
x = 20/10
x = 2

8) 13x - 23 - 45 = -7x + 12
13x + 7x = + 12 + 23 + 45
20x = 35 + 45
20x = 80
x = 80/20
x = 4