What is the x and y to 3y+7x=4 - 6x+y=-7

x=1 and y=-1

Step-by-step explanation:

Lets name the equations as

3y+7x=4 or 7x+3y-4=0 ... eq (1)

-6x+y=-7 or - 6x+y+7=0 ... eq (2)

multiplying eq (2) with 3 and subtracting eq (1) from eq (2)

(-6x+y+7=0) * 3

(-18x+3y+21) - (7x+3y-4) = 0

we can write it as

-18x+3y+21-7x-3y+4=0

-25x + 25=0

-25x=-25

x=1

plugging the value of x in eq (1)

7*1+3y-4=0

7+3y-4=0

3y+3=0

3y=-3

y=-1

so x=1 and y=-1