E3dits4wolfStezal E3dits4wolfStezal

12-08-2016
Mathematics

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two equations are given below: a – 4b = 10 a = b – 2 what is the solution to the set of equations in the form (a, b)? (–5, –3) (–6, –4) (–4, –2) (–8, –6)

Respuesta :

nobillionaireNobley nobillionaireNobley

20-08-2016

a - 4b = 10 . . . . . (1)
a = b - 2 . . . . . . (2)
putting (2) into (1), gives:
b - 2 - 4b = 10
-3b = 10 + 2 = 12
b = 12/-3 = -4

From (2), a = -4 - 2 = -6

Therefore, solution is (-6, -4)

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