Question

3y+4y-12 = 5y-3y+1
2m-3-3m+1 = 2+m+4
10-20x+6x = 10-14x
3y+4y-12 = 5y-3y+1

Ma ajutati si pe mine cu astea va rog!!!
Dacă se poate si proba la ele...
Multumesc din suflet!!!

Answer 1

a)3y+4y-12=5y-3y+1
3y+4y-5y+3y=1+12
5y=13
y=13/5
p:y(3+4-5+3)=13
13×5/5=13
b)2m-3-3m+1=2+m+4
2m-3m-m=6+3-1
-2m=8
m=-4
p:m(2-3-1)=6-1+3
-4×(-2)=8
c)10-20x+6x=10-14x
-20x+6x+14x=10-10
0=0
valabil pt orice x
ex x=2
p:x(-20+6+14)=10-10
2×0=0
3)3y+4y-12=5y-3y+1
3y+4y-5y+3y=1+12
5y=13
y=13/5