Question

galera me ajudem por favor
1) resolva as equações do 1 grau.

A) y-3=-4y+7

B)– x – 2x – 4 = 11 – 2x + 4x

c) 9 – x + 2 = - 5x + 37

d) 4x – 3 – 2x = - 20 – 3 – 2x

e) 3(x + 10) – 2(x – 5) = 4 – 5×

f) 2(x – 6) = - 3(5 + x)

g) 3(x – 1) – 2(x – 4) = 1

h) 9y – (4 – 9y) = - 12

i) 7(x – 1) – 2(x – 5) = x - 5

j)
$\frac{3x}{4} - \frac{x}{2} = - 2$
k)
$\frac{x}{3} + \frac{x}{2} = - 2$
l)
$\frac{3x}{9} - 2 + \frac{2x}{3}$
m) 2(y-3)+4=-2y+6

n) 10-2(3x+1)=5+3(x-5)


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Answer 1

Resposta:

A) y-3=-4y+7

y+4y=7+3

5y=10

y=10/5

y=2

B) -x-2x-4=11-2x+4x

-3x-4=11+2x

-3x-2x=11+4

-5x=15

x=15/-5

x=-3

C) 9 – x + 2 = - 5x + 37

-x+11=-5x+37

-x+5x=37-11

4x=26

x=26/4:2/2

x=13/2

d) 4x – 3 – 2x = - 20 – 3 – 2x

2x-3=-23-2x

2x+2x=-23+3

4x=-20

x=-20/4

x=-5

e) 3(x + 10) – 2(x – 5) = 4 – 5x

3x+30-2x+10=4-5x

x+40=4-5x

x+5x=4-40

6x=-36

x=-36/6

x=-6