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What is the substiution eqaution for x plus y equals 15 and 4x plus 3y equals 38?
Updated: 8/18/2019
Wiki User
∙ 13y agoBest Answer
x + y = 15
4x + 3y = 38
from the first equation, y = 15-x
substitute this value in the second equation as follows:
4x + 3(15-x)= 38
4x + 45 - 3x = 38
x + 45 = 38
x = 38 - 45
so, x = -7
substitute this value to solve for y:
y = 15 -x
y = 15-(-7)
y = 22
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∙ 13y agoThis answer is:
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