Question

4. Aflați x pentru figurile de mai jos: ​

Answer 1

a) x+4x+5=180

5x+5=180

5x=175

x=35

b)5x+3x=180

8x=180

x=22, 5

c)x+70+x-10=180

2x+60=180

2x=120

x=60

d)5x+4x=90

9x=90

x=10

e)3x+15+2x=90

5x+15=90

5x=75

x=15