Question

rezolvati aceste ecuatii plz

1. x:5:2=5

2. x*7+18=60

3.(x-5):5=5

4.(x+7)*10=90

5.(5*x):4=10

Answer 1

1. x:5:2=5
x:5=2·5
x:5=10
x=5·10
x=50.
2.x·7+18=60
x·7=60-18
x·7=42
x=42:7
x=6.
3.(x-5):5=5
x-5=5·5
x-5=25
x=25+5
x=30.
4. (x+7)·10=90
x+7=90:10
x+7=9
x=9-7
x=2.
5.(5·x):4=10
5·x=10·4
5·x=40
x=40:5
x=8.
Sper că te-am ajutat ! :)