Question

rez ecuatiile
1)2x=-7
2) (x+2):2=4
3) x-3/4=x+1

Answer 1

X=-7/2

X+2=8, x=6

x-3=4x+4

3x=-7

X=-7/3

Answer 2

1)

2x=-7

2x:2=-7:2

x=-7:2

$x = - \frac{7}{2}$

2)

(x+2):2=4

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

x+2=8

x+2-2=8-2

x=8-2

x=6

3)

$\frac{x-3}{4} = x + 1 \\ \\ 4 \times \frac{x-3}{4} = 4(x+1)$ x-3=4x+4

x-4x-3=4x-4x+4

x-4x-3=4

x-4x-3+3=4+3

x-4x=4+3

-3x=7

-3x:(-3)=7:(-3)

x=7:(-3)

x=-7:3

$x = - \frac{7}{3}$