megamorph
17.03.2020 •
Mathematics
How do you solve the system of linear equations by graphing
X+y=7
-x+y=-7
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Ответ:
x = 7 and y = 0
Step-by-step explanation:
We can either solve by substitution method or by elimination method or both method . We will solve by both the elimination and substitution method.
X+y=7 (1)
-x+y=-7 (2)
Subtract equation (2) from equation(1)
2x = 14
Divide both-side of the equation by 2
2x/2 = 14/2
x = 7
Substitute x = 7 into equation (1)
x+y=7
7 + y = 7
Subtract 7 from both-side of the equation
7-7 + y = 7-7
y = 0
x = 7 and y =0
Ответ:
3279.82 cubic inches
53746.66 cm³
53.75 liters
Step-by-step explanation:
I hope this helps u! :D