Question

a-b-4 = 0
2a - b - 9:=0​

Answer 1

Step-by-step explanation:

$a - b = 4 \\ \\ 2a - b = 9 \\ \\ \pink{subtractingi\: \: \: 1 \: \: \: 2} \\ \\ 2a - b - (a - b) = 9 - 4 \\ \\ 2a - b - a + b = 5 \\ \\ a = 5 \\ \\ \blue{now} \\ \\ 5 - b = 4 \\ \\ b = 5 - 4 \\ \\ b = 1 \\ \\ \red{hence} \\ \\ a = 5 \\ b = 1$

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