resolva as equações do 1° grau :
A- x + 19 = 37
B- 3x + 18 = 90
C- 5x - 25 = 100
D- 4x - 16 = 64
E- 10x + 16 = 14x +8
F- 2 (x - 3) = 3 (x - 3)
G- 4 (5x - 3) - 64 (3 - x) -3 (12x - 4) =96
H- 5(x + 1) +6 (x+2) =9 (x+3)
Soluções para a tarefa
A- x + 19 = 37
x = 37 - 19
x = 18
B- 3x + 18 = 90
3x = 90 - 18
3x = 72
x = 72 ÷ 3
x = 24
C- 5x - 25 = 100
5x = 100 + 25
5x =125
x =125 ÷ 5
x = 25
D- 4x - 16 = 64
4x = 64 - 16
4x = 48
x = 48 ÷ 4
x = 12
E- 10x + 16 = 14x +8
10x - 14x = 8 - 16
-4x = -8
4x = 8
x = 8 ÷ 4
x = 2
F- 2 (x - 3) = 3 (x - 3)
2x - 6 = 3x - 9
2x - 3x = -9 + 6
-x = -3
x = 3
G- 4 (5x - 3) - 64 (3 - x) -3 (12x - 4) = 96
20x - 12 - 192 + 64x - 36x + 12 = 96
20x + 64x - 36x = 96 + 12 + 192 - 12
48x = 288
x = 288 ÷ 48
x = 6
H- 5(x + 1) +6 (x+2) =9 (x+3)
5x + 5 + 6x + 12 = 9x +27
5x + 6x - 9x = 27 - 5 - 12
2x = 10
x = 10 ÷ 2
x = 5
x + 19 = 37
x = 37 - 19
x = 18
B )
3x + 18 = 90
3x = 90 - 18
3x = 72
x = 72/3
x = 24
C )
5x - 25 = 100
5x = 100 + 25
5x = 125
x = 125/5
x = 25
D )
4x - 16 = 64
4x = 64 + 16
4x = 80
x = 80/4
x = 20
E )
10x + 16 = 14x + 8
10x - 14x = 8 - 16
- 4x = - 8 * (-1(
4x = 8
x = 8/4
x = 2
F )
2 ( x - 3 ) = 3 ( x - 3 )
2x - 6 = 3x - 9
2x - 3x = - 8 + 5
- x = - 3 * (-1)
x = 3
G )
4 ( 5x - 3 ) - 64 ( 3 - x ) - 3 ( 12x - 4 ) = 96
20x - 12 - 192 + 64x - 36x + 12 = 96
20x + 64x - 36x = 96 + 12 + 192 - 12
48x = 288
x = 288/48
x = 6
H )
5 ( x + 1 ) + 6 ( x + 2 ) = 9 ( x + 3 )
5x + 5 + 6x + 12 = 9x + 27
5x + 6x - 9x = 27 - 5 - 12
2x = 10
x = 10/2
x = 5
espero ter ajudado