Question

como resolver as equações:
17x+40=21x
8x-14=2x
7x+1-5x=9
y+9y+5=-15
17x-1=15x+3
16-x=x+25
20x-13=20+9x
21x+1=11x+6
3x=2

Answer 1

17x+40=21x
40=21x-17x
40=4x
x=40/4
x=10

8x-14=2x
8x-2x= 14
6x= 14
x= 14/6

7x+1-5x=9
7x-5x=9-1
2x=8
x=8/2
x=4

y+9y+5=-15
10y=-15-5
10y=-20
y=-20/-10 (.-1)
y=2

17x-1=15x+3
17x-15x=3+1
2x=4
x=4/2
x=2



16-x=x+25
-x-x= 25-16
-2x=9
x=9/2



20x-13=20+9x
20x-9x=20+13
11x=33
x=33/11
x=3




21x+1=11x+6
21x-11x=6-1
10x=5
x=5/10 (simplificando)
x=5/10 :5
x=1/5




3x=2
x=2/3