Question

Revisao de matematica​

Answer 1

2a) 15- 4
x- 20
4x=300
x= 75

b) 1200- 100
240- x

1200x= 240·100
1200x= 24000
x= 24000/1200
x=20 %

c) 1200 - 100
336- x

1200x= 336 x 100
1200x= 33600
x= 33600/1200
x=28 %

d) X=15000*6
100
x=900 (desconto)
x=15000-900
x=14100
Resposta: R$14.100,00

e) 4255 --> 115
x --> 100

4255/x=115/100
115x=4255.100
x=425500/115
x=3700