2x+y=-9 -3x+11=y whathe is the answer
Mathematics · High School · Thu Feb 04 2021
Answered on
Given the equation:
2x + y = -9
-3x + 11 = y
Determine the answer.
Solution:
In order to determine the answer, we simply need substitute the value of y from the second equation to the first equation, and solve first for x.
2x + y = -9
2x + ( - 3x + 11) = -9
2x - 3x + 11 = -9
-x + 11 = -9
Transpose -x and -9 to the opposite sides of the equation, hence it must be taken to note that in transposing a number, the sign changes.
11 + 9 = x
x = 20
Substitute the value of x to the 2nd equation, and then solve for y.
-3(10) + 11 = y
-30 + 11 = y
y = -19
Final answer:
x = 20
y = -19