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7nadin3 [17]
3 years ago
11

Solve the equation using elimination and describe your steps.

Mathematics
1 answer:
Mariana [72]3 years ago
6 0
A : x = y - 3
B : 2x + y = 12

from A to B

2(y-3) + y = 12
2y - 6 + y = 12
3y = 18
y = 6

y = 6 to A

x = y - 3
x =6 -3
x=3
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Read 2 more answers
write an equation to represent"three consecutive integers is 12 less than 4 times the middle integer'
Sever21 [200]

Consider that the three consecutive integers are:

least integer = n

middle integer = n + 1

greatest integer = n + 2

THe expression "three consecutive integers is 12 less than 4 times the middle integer" can be written as follow:

n + (n + 1) + (n + 2) = 4(n +1) - 12

In order to find the numbers, proceed as follow:

n + (n + 1) + (n + 2) = 4(n +1) - 12 cancel parenthesis

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