imanilos imanilos

16-01-2017
Mathematics

contestada

Enter values of a and b for which x=4 is a solution of the equation shown.
ax+4=5x+b

Respuesta :

16-01-2017

4a+4=20+b

If a = 5 and b = 4

then the equation would be:

20+4=20+4
24 = 24
That works out to be true

A= 5 B= 4 X= 4

Answer Link

16-01-2017

ax+4=5x+b ...1
Substituting x=0 into 1,
0+4=0+b
b=4
Substituting b=4 into 1,
ax+4=5x+4
ax+4-5x-4=0
ax-5x=0
ax=5x
a=5x/x
a=5
Therefore, a=5 and b=4

Answer Link

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