Please help me it would be a great honor for your help!!
2 answers:
Answer:
<u>(6,21)</u>
Step-by-step explanation:
There are two ways to solve a system of equations: mathematically by substitution, or by graphing.
<u>Math Substitution:</u>
y = x + 15
y = 7x - 21
Since both expression are equal to the same number, set them equal to each other:
x + 15 = 7x - 21
6x = 36
x = 6
Then use x = 6 in either equation to find y:
y = x + 15
y = 6 + 15
y = 21
===========
<u>Graphically:</u>
Graph both equations and find the solution for x and y where they intersect. See attachment. Intersection at (6,21)
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