Question

1. Resolva as seguintes equações de 1º grau:

A. 2x - 8 = 8
B. 3x + 1 = 19
C. 7y - 4 = 10
D. 2 t + 1 = -8
E. 5 + 7x = -9
F. 11 - 3y = 2
G. 3x = -7 + x
H. 9x + 5 = 4x
I. 10x = 15 + 9x

Answer 1

A)R: 2x - 8 = 8
2x=8+8
2x=16
x=16/2
| x=8|
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B)R: 3x + 1=19
3x=19-1
3x=18
x=18/3
| x=6|
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C)R: 7y -4= 10
7y=10 +4
7y=14
y=14/7
| y=2 |
__________________
D)2t + 1 = -8
2t= -8 -1
2t = -9
t = -9/2
| t= -9/2 |
___________________
E) 5 + 7x = -9
7x= -9 -5
7x=14
x= 14/7
| x= 2 |
_____________________
F) 11 - 3y= 2
-3y= 2-11
-3x=-9
-y=-9/3
| y= -3 |
_______________________
G)3x= -7+x
3x-x = -7
2x=-7
x= -7 /2
| x= -7/2 |
__________________________
H)9x+5=4x
9x-4x=-5
5x= -5
x=-5/5
| x=-1 |
___________________________
I)10x =15+9x
10x-9x= 15
x=10x55
| x= 15 |
___________________________


Espero ter ajudadooo! bons estudos!