goldenstorm765 goldenstorm765

10-01-2017
Mathematics

contestada

1.solve the following system by substitution:

4x+y=24
y=-4x+24

2.solve the following system by substitution

y=2x+4
3x+y=9

Respuesta :

familiaof5 familiaof5

10-01-2017

4x+(-4x+24)=24 *substitute in the value of y
0+24=24 * simplify
0=-24+24
0=0
3x+2x+4=9 *substitute in the value of y
5x+4=9 * simplify
5x=-4+9
5x=5
x=1

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