Question

solve by substitution method 3x+4y=25
5x-6y=-9​

Answer 1

Step-by-step explanation:

3x=25-4y

x=25-4y/3

put in another equation

5(25-4y/3)-6y=9

125-20y/3-6y=9

125-20y-18y=27

98=38y

49/19=y

Answer 2

3x + 4y= 25

x=25-4y÷3........................... equation 1

5x-6y=-9.

5(25-4y÷3)-6y =-9. (from equation 1)

15(25-4y)÷3-6y =-9

375 - 60y -6y =-9x3

375-66y =-27

375+27 =66y

392= 66y

y=196÷33........................ equation 2

put y=196÷33 in equation 1

x=25-4(196÷33)÷3

x=(25-4x 196) ÷33x3

Step-by-step explanation:

solve it u would get your answer.....

Hope Helpful....