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- #1

$y=2x^2+3x+5$

$ a+3b=1$

$2a - b=1$

Multiply through by 3

$6a - 3b = 3$

Subtract equation (3) from (1)

$6a - 3b = 3$

__$ a + 3b = 1$__

$7a - 0b = 4$

a =$\frac{4}{7}$

Just learning latex on here and trying to understand how I can keep everything in line, which seems difficult with some parts above, is there something I am missing out?

Please advise

Kind regards

Casio