Solve using the elimination method.show your work. If the system has no solution or an infinite number of solutions, state this. 11x+10y=77 , 9x+y=63

Question

hba · Answer

11x+10y=77
10y=77-11x
y=77-11x/10

hba · Answer

now put it in the other equation

hba · Answer

9(77-11x/10)+y=63

hba · Answer

y=63-9(77-11x/10)

hba · Answer

y=63+(693-99x/10)

hba · Answer

nw take lcm

hba · Answer

y=630-693+99x/10

mathteacher1729 · Answer

$$
\begin{align}
11x&+10y&=77 \ 
9x&+y&=63
\end{align}
$$
If you want to eliminate a variable you can multiply the bottom equation by -10

$$
\begin{align}
11x  &+10y &=77 \ 
-90x&-10y &=-630
\end{align}
$$

Now eliminating y should be relatively easy to do. Can you solve the rest of the problem from here?

hba · Answer

oops i thought he meant substitution

mathteacher1729 · Answer

First sentence: "Solve using the elimination method."  ;-p