Question

Equações
1)10.x+3.x+4=5.x+50+2.x+14
2)2.x+4.x+9=3.x+20.x+9
3)16.x+2+2.x=1.x+10+4.x+10+4.x
4)12.x+4=12+10.x+12
5)9.x+15.x+9.x+3=9.x-15.x+9.x+3
6)36.x-1.x+1.x+28-1.x=42
7)9.x-1.x+4=10.x+1.x+11
8)8.x+1.x+5=3.x+20+2.x+5
9)13.x+1=1.x+90+1.x+7+49

Answer 1

1) 10x+3x-5x-2x=50+14-4
8x=60
x=60/8= 7.5

2) 2x+4x-3x-20x=9-9
-17x=0
x=-17

3) 16x+2x-x-4x-4x=10+10-2
9x=18
x=18/9= 2

4) 12x-10x=12+12-4
2x=20
x=20/2= 10

5) 9x+15x+9x-9x+15x-9x=3+3
30x=6
x=30/6= 5

6) 36x-x+x-x=42-28
35x=14
x=14/35= 0.4

7) 9x-x-10x-x=11-4
-3x=7
x=7/-3= -2.333...

8) 8x+x-3x-2x=20+5+5
4x=30
x=30/4= 7.5

9) 13x-x-x=90+7+49-1
11x=147
x=147/11= 13.363636...