SOLUTION: Solve using elimination or substitution 4x-7y =-16;6x+3y = 30?

Question 503725: Solve using elimination or substitution 4x-7y =-16;6x+3y = 30?

Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
4x -7y = -16
6x +3y = 30
.
Multiply the first equation by 3 and the second equation by 2, then subtract to eliminate the 'x' terms.
.
12x -21y = -48
12x +6y = 60
--------------
-27y = -108
y = 4
.
substitute y=4 into first equation
.
4x -7(4) = -16
4x = -16 +28
4x = 12
x = 3
.
Always check your work.
Substitute these values in the second equation.
.
6x +3y = 30
6(3) = 18
3(4) = 12
18+12 = 30
Correct.
.
Answer: x=3, y=4
.
Done.
RELATED QUESTIONS
4x + 7y = -16 6x - y = -24 solve using elimination... (answered by pragya.ban@gmail.com)

6x+5y=4 6x-7y=-20 solve each system using the substitution or elimination... (answered by Alan3354)

Solve one using elimination and one using substitution; 1)4x-y=10 -3x+y=-6... (answered by mananth,solver91311)

Solve using substitution: -y − 5x = -7 2y − 2x = 14 Solve using... (answered by Alan3354)

Solve by elimination 8x + 7y = -16 6x - 3y =... (answered by checkley77)

Solve by elimination. 8x + 7y = -16 6x - 3y =... (answered by checkley77)

Solve by elimination 8x + 7y = -16 6x - 3y =... (answered by Fombitz)

Solve using elimination 7x + 3y = -4 6x + 7y = 32 (answered by stanbon)

solve by using either process of elimination or substitution 3/2x + 3y =2 (answered by stanbon)