Resuelve las siguientes operaciones:
1. x + 4=28
x= 28-4
x= 24
2. y-6.5= 31
y= 31+6.5
y= 37.5
3. 8z=40+3z
8z-3z=40
5z= 40
z= 40
5
z= 8
4. 10x= -5x+60
10x+5x=60
15x=60
x=60
15
x=4
5. -15y+3 = -36-18y
-15y+18y= -36-3
3y= -39
y= -39
3
y= -13
6. 2x+4+(3x-4)= 3x+12
2x+4+3x-4= 3x+12
2x+3x+3x= 12-4+4
2x=12
x= 12
2
x= 6
7. 4 ( 3x+2)-8= 5 (2x+3)+5
12x+8-8= 10x+15+5
12x-10x= 15+5-8+8
2x=20
x= 20
2
x= 10
8. 15x-40-5x-20=0
15x-5x= 40+20
10x= 60
x= 60
10
x= 6
9. 16-(-2x-4)-(5x-3x+2)= -4x-(-8x+2)
16+2x+4-5x+3x-2= -4x+8x-2
2x-5x+3x+4x-8x= -2-16-4+2
-4x=-20
x= -20
-4
x= 5
10. -( 7x-2+12) + (-5x-3x+4)= - (-x+7) - (6x-4-7)
-7x+2-12-5x-3x+4 = x-7-6x+4+7
-7x-5x-3x-x+6x= -7+4+7-2+12-4
-10x = 10
x= 10
-10
x= -1
11. -18 - [3(x+2)+4] = 21 - [6 (-2x-2)+1]
-18 - [3x+6+4] = 21 - [ -12x-12+1]
-18 -3x -6 -4 = 21+12x+12-1
-3x-12x = 21+12-1+18+6+4
-15x= 60
x= 60
-15
x= -4
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