Question

7x-2y=9 and 6y+4x=15
solve by substitution method
step by step answer required to be marked brainliest

Answer 1

7x-2y=9

7x=9+2y

x=(9+2y)/7

6y+4x=15

put the value of x

6y+4×(9+2y)/7=15

6y+(36+8y)/7=15

$\frac{7 \times 6y + 36 + 8y}{7} = 15 \\ \frac{42y + 36 + 8y}{7} = 15$

50y+36=15×7

50y=105-36

50y=69

y=69/50