A man can type 21 words per minutes. how long will it take him to type 3780 words
1 answer:
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To clarify the systems of equations:
We already have opposite coefficients for y, so combine the two equations together:
Divide both sides by 5 to get x by itself:
Because we now know x, we can plug it into one of the equations.
We will plug this value into the first equation:
Add 24 to both sides.
Divide both sides by -1 to get y by itself.
Using elimination, x = 2 and y = -30.
We already have opposite coefficients for y, so combine the two equations together:
Divide both sides by 5 to get x by itself:
Because we now know x, we can plug it into one of the equations.
We will plug this value into the first equation:
Add 24 to both sides.
Divide both sides by -1 to get y by itself.
Using elimination, x = 2 and y = -30.