SOLUTION: Please help me solve this equation, step by step with websites suggestions were I can practice more. i would really appreciate it. Thank you. If r = 5 z then 15 z = 3 y, then r

Question 972699: Please help me solve this equation, step by step with websites suggestions were I can practice more. i would really appreciate it. Thank you.
If r = 5 z then 15 z = 3 y, then r =
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
i usually solve these by finding a common variable and making everythign in terms of that common variable.

your equations are:

r = 5z
15z = 3y

the common variable appears to be z.

solve for z in both equations to get:

z = r/5
z = 3y/15

since r/5 = z and 3y/15 = z, then r/5 = 3y/15.

solve for r as follows:

r/5 = 3y/15
multiply both sides of the equation by 5 to get:
r = 3y/15 * 5 = y/5 * 5 = y
the equation simplifies to:
r = y

you can also just solve for one of the variables in terms of the other and then substitute for that variable.

start with:
r = 5z
15z = 3y

solve for z in terms of y to get:
z = 3y/15 = y/5

replace z with y/5 in the first equation to get:
r = 5 * y/5 which becomes:
r = y

RELATED QUESTIONS
Please I really need help with this equation 2u-9=7u+15-u-20 Could you show me... (answered by richard1234)

Hi Can someone please help me with this problem I would really appreciate it.... (answered by stanbon)

Can you PLEASE HELP ME Find the equation of a line parallel to the line y=2x+4 that... (answered by scott8148)

Hello ! Can you please help me with this? I just don't get it... Iwould really... (answered by Fombitz)

Please help me solve this problem. I would appreciate step by step so that it can help... (answered by gonzo)

5/4x+2=1/x I need help with this, can someone please explain it to me step by step. (answered by rapaljer)

Hello can someone please help me with solving this problem. The directions are solve the... (answered by josgarithmetic)

how can I simplify this radical equation 90 -10 please show me step by... (answered by Alan3354)

Can you please help me solve this equation step by step please: .67 = (1-T)(.8)... (answered by AnlytcPhil)