Question

resolva as equações do primeiro grau:

1) 2x=100
2) 100x=250
3) 5x=25
4) 2x-3=40

Answer 1

1) 2x=100
x=100/2
x=50

2)100x=250
x=250/100
x=2,5

3)5x=25
x=25/5
x=5

4)2x - 3 =40
2x=40+3
2x=43
x=43/2
x=21,5

Answer 2

Resposta:

$a)2x=100$

$x=\frac{100}{2}$

$x=50$

$b)100x=250$

$x=\frac{250}{100}$

$x=\frac{5}{2}$

$c)2x-3=40$

$2x=40+3$

$2x=43$

$x=\frac{43}{2}$