Question

Solve by substitution method
2x-8y=10
3x+8y=15​

Answer 1

2x-8y=10

Solve equation [2] for the variable x

[2] 2x = 8y + 10

[2] x = 4y + 5

// Plug this in for variable x in equation [1]

[1] 3•(4y+5) + 8y = 15

[1] 20y = 0