8,3х+2х-60,5=300 и (1,65-0,3х):0,34=4,5

Question

8,3х+2х-60,5=300
и
(1,65-0,3х):0,34=4,5

Answer 1

10,3х-60,5=300
10.3х=300+60,5
10,3х=360,5
х=360,5:10.3
Х=35

(1,65-0.3Х):0,34=4,5
1,65-0.3х=4,5*0,34
1,65-0,3х=1,53
-0,3х=1,65-1,53
-0,3х=0.12
х=0,12:(-0,3)
х=-0,4