Question

resolva as equações de 1°grau a)5x-4=6x+8
b)3x+6=x-7
c)3x+3=39-2x
d)6x+4=5x-10
e)15x-5=7+2x
f)20x-10=10x+4
g)49-3x=7x-9
h)4x+3=x+3
i)5x+10=x-2
j)7x+7=x-4
k)10x+9=x-81​

Answer 1

Explicação passo-a-passo:

a)5x-4=6x+8

5x-6x=8+4

x=12

b)3x+6=x-7

3x-x=7-6

2x=1

x=1/2

c)3x+3=39-2x

3x+2x=39-3

5x=36

x=36/5

d)6x+4=5x-10

6x-5x=-10-4

x=-14

e)15x-5=7+2x

15x-2x=7+5

13x=12

x=12/13

f)20x-10=10x+4

20x-10x=4+10

10x=14

x=14/10=== 7/5

g)49-3x=7x-9

-3x-7x=-9-49

-10x= -40

x= -40/-10= 4

h)4x+3=x+3

4x - x= 3-3

3x = 0

x =0/3=0

i)5x+10=x-2

5x -x=-2-10

4x= -12

x=-12/4

x=-3

j)7x+7=x-4

7x-x=-4-7

6x=-11

x=-11/6

k)10x+9=x-81

10x-x=-81-9

9x=72

x=72/9=8