Question

Ecuatile 9x+2= 49
-3x+15=0
3= -2x+7

Answer 1

Explicație pas cu pas:

1.9x+2=49/-2

9x=49-2

9x=47/:9

x=47supra 9

S={47 supra9}

2.-3x+15=0/-15

-3x=-15/:(-3)

x=5

S={5}

3.3=-2x+7

2x=7-2

2x=4/:2

x=2

S={2}

Spor la teme!