Question

resolva as equações 5 + 6 x = 5x + 2 i)x+2x-1-3=x j)-3x+10=2x+8+1 k)5x-5+x=9+x l)7x-4-x=-2x+8-3x ​

Answer 1

5+6x=5x+2

6x-5x=2-5

x=-3

x+2x-1-3=x

x+2x-x=3+1

2x=4

x=4÷2

x=2

-3x+10=2x+8+1

-3x-2x=8+1-10

-5x=-1

x=-5÷-1

x=5

5x-5+x =9+x

5x+x-x=9+5

5x=14

x=14/5

7x-4-x=-2x+8-3x

7x-x+2x+3x=8+4

11x=12

x=12/11