Solve, using the substitution method.

y – 3x = 7
21 + 9x = 3y

A.
There is no solution.

B.
There are an infinite number of solutions.

C.
The solution is (1, 10)

D.
The solution is (28, 0)

Question

Solve, using the substitution method.

y – 3x = 7
21 + 9x = 3y
 
 A.
There is no solution.
 
 B.
There are an infinite number of solutions.
 
 C.
The solution is (1, 10)
 
 D.
The solution is (28, 0)

anonymous · Answer

@***[ISURU]*** @littlelotte @ganeshie8 @jim_thompson5910 @Philoctetes Help me plz

anonymous · Answer

y - 3x=7
21 + 9x = 3y


first 
y= 3x + 7
then substitute

21 + 9x = 3 (3x +7)
21 = -9x + 9x + 21
0 = 0

i think there is no solution