Răspuns:
Păi este destul de simplu.
Explicație pas cu pas:
a) 1753- x =783
=> x = 1753-783
=> x= 980
b) x- 633 =2941
=>x = 2941 - 633
=>x = 2308
20. a) x+89=115
x=115-89
x=26
b) 2×x+23=91
2×x=91-23
2×x=68
x=68:2
x=34
c) 327-3×x=15+48
327-3×x=63
3×x=327-63
3×x=264
x=264:3
x=88
d) 15+(x+2)+21=47
x+17+21=47
x+38=47
x=48-37
x=11
e) 2×x+37=79-14
2×x+37=65
2×x=65-37
2×x=28
x=28:2
x=14
f) 32+(2×x-5)=63+14
2×x+27=77
2×x=77-27
2×x=50
x=50:2
x=25
