Math

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

Asked by AnneS2 on 12 Jul 04:52

Last updated by anonymous on 13 Jul 11:19

1 Answers

Log in to answer

Answered by CherieS on 13 Jul 11:19

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