Question

Va rog urgent,dau coroană!!! ​

Answer 1

Ex 1

3-2x=9

<=> 2x=3-9

<=> 2x=-6

<=> x=-3

Ex2

3x-2y=4

Soluția ecuației este: B (2; 1)

Proba: 3*2-2*1 = 6-2 = 4 Adevărat

Ex 4

5x-1 = 3(5x-2)

<=> 5x-1 = 15x-6

<=> - 1+6 = 15x-5x

<=> - 5 = 10x

<=> x= $- \frac{1}{2}$