Question

Make "x" the subject of:

1. 7x + 3y = d
2. ax + by = c
3. y = mx + c

Since "x" is attached to other variables and or numbers, how would I solve it ? I'm aware I need to get "x" all by itself, but a bit "confuzzled" lol.

Answer 1

\[7x+3y=d\]
\[7x=d-3y\]
\[x=\frac{d-3y}{7}\] is the first one

Answer 2

Basically you are solving for x.

Answer 3

second one is similar. just replace d by c, a by 7 and b by 3

Answer 4

OHHHHHHHH !! Okay Sat I got you.

Answer 5

good!. last one is a little different
\[y=mx+c\]
\[y-c=mx\]
\[\frac{y-c}{m}=x\]

Answer 6

ok not really different

Answer 7

Thank you so much ! Now this assignment should be easier. :)

Answer 8

So the second one \[x = c - by \div a\] right?

Answer 9

x = (c - by) / a

Answer 10

Kk, ty.