lisettetorres01
02.03.2021 •
Mathematics
Solve the system of equations by using substitution
y=2x-2
2x+y=10
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Ответ:
2x+2x-2=10
4x-2=10
+2 +2
4x=8
x=2
y=2(2)-2
Y=2
Ответ:
Cost of 1 hamburger = $1.3
Step-by-step explanation:
Assume;
Cost of 1 hamburger = a
Cost of 1 French fries = b
On first trip
3a + 4b = 7.10eq1
On second trip
2a + b = 3.40eq2
From eq2 x 4
8a + 4b = 13.6eq3
From eq3 - eq1
5a = 6.5
a = 1.3
Cost of 1 hamburger = $1.3