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SoccerEden7274
11.12.2020 •
Mathematics
How do you solve a system of equations by elimination? How do you solve a system of equations by substitution?
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Ответ:
IF you have two equations with the 2 variables, x and y, you can substitute one y-value with the other, then solve.
Step-by-step explanation: For example:
y = 2x + 4
3x+y = 9
We can substitute the value of y from the first equation, 2x + 4, into the second equation. So, the second equaton becomes:
3x + 2x + 4 = 9
Now solve for x:
5x + 4 = 9
5x = 5
x = 1
This value of x then can be used to find y, by substituting in the value "1" for x in the first equation:
y = 2x + 4 = 2(1) + 4 = 2 + 4 = 6
So, the solution to this linear system is (1, 6)
Ответ:
$541.64
Step-by-step explanation:
Caleb's take Home Pay from the Restaurant =$501.64
He earns an additional $40 per month for dog-walking.
Therefore,
Caleb's net monthly income =$501.64+40 =$541.64