Question

4) Solve and check:
5a - 2b = 3
2a = -b

Answer 1

do you know how to do this type of problem?

Answer 2

not at all i never learned it

Answer 3

well if you had an eq with only one variable in it, would you know how to solve it?
Such as 3x=15

Answer 4

yes divide both sides by 3 and get x=5

Answer 5

right. here you are given in the 2nd eq that -b=2a. so b=-2a. now you can substitute "-2a" in the 1st eq wherever you have a "b"

Answer 6

5a-2(-2a)3?

Answer 7

=3

Answer 8

oh yea i typed it wrong

Answer 9

but yes you are about to find out what a equals

Answer 10

how?

Answer 11

oo i get it :")

Answer 12

what is 5a-2(-2a) equal to?

Answer 13

a =3?

Answer 14

ok hold on

Answer 15

ok im confused..

Answer 16

-b=6

Answer 17

?

Answer 18

a=1/3
so 5*1/3-2b=3
so 5/3-2b=3
so -2b =3-5/3
so -2b= 9/3-5/3=4/3
so b=4/3*(-1/2)
sob=-4/6=-2/3

Answer 19

ok?