{y=15+3x,y=27-3x}

Question
Systems of equations
{y=15+3x,y=27-3x}

2020-10-29
Let: y=15+3x
y=27-3x
Add each side to eliminate 3x and solve for y: 2y=42
y=21
Solve for x using (1)
21=15+3x
6=3x
2=x
So, the solution of the system is: (2,21)

Relevant Questions

Solve the system: {(3x,+,y,=,9),(2x,-,y,=,1):}
Solve the system: {(-3x,+,y,=,2),(9x,-,3y,=,-6):}
Solve: {(5x,-,4y,=,-5),(3x,+,y,=,14):}
x-y+2x=3
2x+z=1
3x+2y+z=4
What are the solutions to the following system of equations?
$$y = x^{2} + 3x − 7$$
$$3x − y = −2$$
Solve the matrix equation: $$4[2x,y,3z]+3[2,−4,6]=[20,−4,54]$$
Solve the matrix equation: $$\displaystyle{4}{\left[{2}{x},{y},{3}{z}\right]}+{3}{\left[{2},−{4},{6}\right]}={\left[{20},−{4},{54}\right]}$$