Question: Math

SOlve for 3a+5u=17 and 2a+u=9

In Math | Asked by AnneS2
Answers

2a+u=9

2a+u-2a=9-2a

u=9-2a

 3a+5u=17

 3a+5(9-2a)=17

3a+(5)(9)    (5)(-2a)=17

3a+45-10a=17

45-7a=17

45-7a-45=17-45

-7a=-28

-7a/-7=-28/-7

a=4

u=9-2a

u=9-2(4)

u=9-8=1

CherieS | 417 days ago