groverparham3
15.12.2020 •
Mathematics
Use the substitution method to solve the system of equations.
3x + 4y = 10
y = x-1
A. (2,3)
B. (2,1)
C. (3,2)
D. (1,2)
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Ответ:
B
Step-by-step explanation:
3x + 4(x-1) = 10
3x+4x-4=10
7x-4=10
+4 +4
7x=14
/7 /7
x=2
y=(2)-1
y=1
Ответ:
A grads B each had the same C i think 10,000