Leahh15
Answered

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If 2a - b = 4 , find a.

Sagot :

JoshEast

Answer:  a = ¹/₂ (4 + b)

Step-by-step explanation:

To solve for 'a' we have to make it the subject of the equation. Since there are two unknowns ('a' & 'b'), we won't get a numerical value of 'a', but an expression in terms of the second unknown 'b'.

Since 2a - b = 4                     [add 'b' to both sides]

then          2a = 4 + b             [divide both sides by 2 = multiplying by  ¹/₂]

                   a = ¹/₂ (4 + b)

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