So we want to solve <span><span><span>2x </span>− 40 </span>= <span>3y </span></span>for x<span><span><span><span>2x </span>− 40 </span>+ 40 </span>= <span><span>3y </span>+ 40</span></span>(Add 40 to both sides!)<span><span>2x </span>= <span><span>3y </span>+ <span>40
Now divide both sides by 2!
</span></span></span>

Now substitute


Which then gives us..
<span><span>2y </span>= <span><span>−<span>6y </span></span>− 32</span></span>(Make sure to simplify both sides of the equation)<span><span><span>2y </span>+ <span>6y </span></span>= <span><span><span>−<span>6y </span></span>− 32 </span>+ <span>6y</span></span></span>(Now add 6y to both sides)<span><span>8y </span>= <span>−<span>32
Now divide both sides by 8
</span></span></span>

Now we have to substitute -4 for y in

So we end up getting...
<span>
x = <span><span>
14<span>
and </span></span>
y </span></span>
= <span>
−<span>
4.
</span></span>
Hope this helps!
Answer:
11
Step-by-step explanation:
because that are 11 pencils that are 6 inches or longer, that's what the picture says.
I do not understand what you want me to solve.
Step-by-step explanation:
7x+3y=42.
y=-5x+30.
7x+3(-5x+30)=42
7x-15x+90=42
8x=42-90
-8x=-48
x=-48/-8
x=6
y=-5x+30
y=-5×6+30
=-30+30
y=0
(6,0)