Question

Rezolvați în R ecuațiile a) 6(x+2)-8=3x+14 b) 7x-9=2(3x+1) c) 5(x-0,4)=17-2x d) 23-41=7(x+3) e) 44-13x=100-2(8x-5) f) 3(x-2)+2(x-3)=5x-12

Answer 1

a) 6(x+2)-8=3x+14
6x+12-8=3x+14
6x+4=3x+14
6x-3x=14-4
3x=10
x=3,(3)
b)7x-9=2(3x+1)
7x-9=6x+2
7x-6x=2+9
x=11
c)5(x-0,4)=17-2x
5x+2=17-2x
5x+2x=17-2
7x=15
x=2,(06)
d)23-41=7(x+3)
-17=7x+21
7x=21+17
7x=38
x=5,(4285)
e)44-13x=100-2(8x-5)
44-13x=100-16x+10
44-13x=110-16x
44-110=-16x+13x
-66=-3x
x=22
f)3(x-2)+2(x-3)=5x-12
3x-6+2x-6=5x-12
5x-12=5x-12
5x-5x=-12+12
0=0