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BaLLatris [955]
2 years ago
5

Please help! I don't understand this!! Solve using substitution:

Mathematics
1 answer:
Ilya [14]2 years ago
3 0
First you solve for y for the top equation, making the top equation become y=-3+5=x.
now we have to substitute that into 3x-8y=24.

that gives you 3x-8(-3+5x)=24
now you solve it for x, which is 0.
now you have to substitute 0 for x in the equation y=-3+5x, so it now becomes y=-3+5*0.
when you solve this for y, you get -3. this means your answer is y=-3 and x=0
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Evaluate the following expression using the values given: Find 2x - 3y - z if x = -2, y = 3, and z = -2
Romashka [77]
<span>2x - 3y - z
Substitute the variables for the numbers provided for them
</span><span>2(-2) - 3(3) - (-2)
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Subtract 9 from -4
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Convert Subtract -2 from -13. It would be the same as adding 2 to -13.
Final Answer: -11</span>
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