Question

alguien sabe resuelve las siguientes ecuaciones


2× + 5 = 9



3× + 7 = 2× -2



5× -9 = 3× +6



2× -5 = 3× +4



5× -1 = 7× -4

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Answer 1

Hola!

1)2x + 5 = 9

$2x+5-5=9-5$

$2x=4$

$\frac{2x}{2}=\frac{4}{2}$

$x=2$

2)3x + 7 = 2x -2

$3x+7-7=2x-2-7$

$3x=2x-9$

$3x-2x=2x-9-2x$

$x=-9$

3)5x -9 = 3x +6

$5x-9+9=3x+6+9$

$5x=3x+15$

$5x-3x=3x+15-3x$

$2x=15$

$\frac{2x}{2}=\frac{15}{2}$

$x=\frac{15}{2}$

4)2x -5 = 3x +4

$2x-5+5=3x+4+5$

$2x=3x+9$

$2x-3x=3x+9-3x$

$-x=9$

$\frac{-x}{-1}=\frac{9}{-1}$

$x=-9$

5)5x -1 = 7x -4

$5x-1+1=7x-4+1$

$5x=7x-3$

$5x-7x=7x-3-7x$

$-2x=-3$

$\frac{-2x}{-2}=\frac{-3}{-2}$

$x=\frac{3}{2}$