Solve the system of equations.

13i + 5 = c

6.50i + 20 = c

Question

Solve the system of equations.

13i + 5 = c

6.50i + 20 = c

caroline1218 · Answer

@jhonyy9 @imqwerty @nincompoop @mathmale

misty1212 · Answer

HI!!

misty1212 · Answer

set them equal and solve

caroline1218 · Answer

Hey! Would you mind helping me solve this problem?

misty1212 · Answer

$$\huge 3i+5=6.5i+20$$ solve for $i$

caroline1218 · Answer

Which method are you using?

misty1212 · Answer

a) subtract $3i$ from both sides first

misty1212 · Answer

b) then subtract $20$ from both sides

caroline1218 · Answer

Wait, 3i or 13i?

misty1212 · Answer

oh i mis copied it is $$\huge 13i+5=6.5i+20$$

misty1212 · Answer

in that case, subtract $6.5i$ from both sides first

misty1212 · Answer

then subtract 5 from both sides, and finally divide both sides by $6.5$

caroline1218 · Answer

@misty1212 Which method of solving a system of equations is this?

misty1212 · Answer

i am not sure what you are asking

caroline1218 · Answer

As in elimination, substitution, graphing

misty1212 · Answer

you have $c=$ something and also $c=$ something else
set those two somethings equal and solve

caroline1218 · Answer

Do I have to change the equations in order to use one of those methods?

misty1212 · Answer

i guess we can call it "substitution" since you are substituting an expression for $c$ in the equations

misty1212 · Answer

no, just set them equal and solve

caroline1218 · Answer

Ok, so then you would consider it substitution? @misty1212

misty1212 · Answer

sure

caroline1218 · Answer

Ok, thanks!

misty1212 · Answer

$$\color\magenta\heartsuit$$