1)resolva as equações ‚ sendo U=Q:
A)9(x-3)+1=18 B)9x-3(2x+2)=15 C)5(3-x)=2(x-4)+15 D)3(x-2)- 5(x-1)=- 7
A)9(x-3)+1=18 B)9x-3(2x+2)=15 C)5(3-x)=2(x-4)+15 D)3(x-2)- 5(x-1)=- 7
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A)
9(x-3)+1=18
9x - 27 + 1 = 18
9x - 26 = 18
9x = 18 + 26
9x = 44
x = 44/9
B)
9x-3(2x+2)=15
9x - 6x - 6 = 15
3x - 6 = 15
3x = 15 + 6
3x = 21
x = 21/3
x = 7
C)
5(3-x)=2(x-4)+15
15 - 5x = 2x - 8 + 15
15 - 5x = 2x + 7
15 - 5x - 2x = 7
15 - 7x = 7
- 7x = 7 - 15
- 7x = - 8
x = - 8/-7
x = + 8/7
D)
3(x-2)- 5(x-1)=- 7
3x - 6 - 5x + 5 = - 7
3x - 5x - 6 + 5 = - 7
- 2x - 1 = - 7
- 2x = - 7 + 1
- 2x = - 6
x = - 6/-2
x = + 6/2
x = 3