Question

equaçao  de primeiro garu
7x+8=4x-10

4x-15=-2x+3

7(x-5)=3(x+1)
3(x-2)=4(-x+3)
5(2x-4)=7(x+1)-3

Answer 1

7 x  + 8 = 4x - 10

7x - 4x = -10 - 8
3x = -18 (-1)
x = $\frac{18}{3}$
x = 6

4x - 15 = -2x +13

4x + 2x = 13 + 15
6x = 28
x = $\frac{28}{6}$
 
7 (x-5) = 3 (x+1)

7 - 5x = 3 + 1x
-5x - 1x = 3 - 7
-6x = -4 (-1)
x = $\frac{4}{6}$

3 (x-2) = 4 (-x +3)

3 - 2x = 4 -3x
-2x +3x = 4 - 3
 x = 1

5 (2x - 4) = 7 (x+1) -3

5 - 2x = 7 +1x -3
-2x - 1x = 7 - 3 -5 
 x = -1

Espero ter ajudado, beijos!

Answer 2

7x+8=4x-10

4x-15=-2x+3==> 4x+2x=3+15==> 6x=18==> x= 3

7(x-5)=3(x+1)==> 7x-35=3x+3==>7x-3x=3+35==>4x=38==>x=38/4

3(x-2)=4(-x+3)==>3x-6=-4x+12==>3x+4x=12+6==>7x=18==>x=18/7

5(2x-4)=7(x+1)-3==> 10x-20=7x+7-3==>10x-7x=7-3+20==>3x=24==>x=8