Answer:
-6x -15y = 21
Step-by-step explanation:
2x + 5y = −7
BOX x − 15y = BOX
Given equation is 2x + 5y = -7
When system of equations have infinite solutions then the graph of both lines overlaps.
The graph of line overlaps means both the equations should be same
We compare both the given equations
For +5y in the first equation we have -15y in the second equation
+5y is multiplied with -3 to get -15y
So we multiply 2x by -3. its -6x
-6x in the first box
Now multiply -7 with -3. so its 21
21 in the second box
Answer is : -6x -15y = 21
