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suter [353]
4 years ago
12

9x-2y=19 7x=21 can you please help me answer this question

Mathematics
1 answer:
avanturin [10]4 years ago
3 0
We have such system of eq
\left \{ {{9x-2y=19} \atop {7x=21}} \right.
First lets solve second eq
7x=21   /:7   divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19    /-27 subtract 27 both sides
-2y=-8     /:(-2)  divide both sides by -2
y=4 - its the answer

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<h3>Rate of change of a line</h3>

The rate of change of a line is also known as the slope of the line. The formula for calculating the slope of a line is expressed as:

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Learn more on rate of change here: brainly.com/question/25184007

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