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Zâmbărici2017
a fost răspuns

Determinative nr natural x care verifica egalitatile: a) x+89=115
b) 2×x+23=91
c) 327-3×x=15+48
d) 15+(x+2)+21=47
e) 2×x+37=79-14
f) 32+(2×x-5)=63+14
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Răspuns :

a)x=115-86
a=26
b)2x=68
x=34
c)327-3x=63
3x=327-63
3x=264
x=88
d)x+2=11
x=9
e)2x+37=65.
2x=28
x=14
f)32+(2x+5)=77
2x+5=45
2x=40
x=20
Scalambaita
a) x=115-89=26
b) 2x=91-23=> 2x=68=>x=68:2=34
c)327-3x=64=>3x=327-64=>3x=263
x=263:3=87,6
d) 15+(x+2)=47-21
15+x+2=26
15+x=26-2
15+x=24
x=24-15=9
e) 2x+37=65
2x=65-37
2x=28
x=28:2=14
f) 32+2x-5=77
32+2x=77+5
32+2x=82
2x=82-32
2x=50
x=50:2=25

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