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a fost răspuns

a) x+235=709
b) 3x+57=402
c)92-2x=136+18
d)28+(x+13)+52=113
e)12+2x+23=53
f)12+(x-15)=63

Răspuns :

Coco81
a x+235=709
x=709-235
x=474
474+235=709
b
3x+57=402
3x=402-57
3x=345
x=345:3
x=115
c 92-2x=136+18
92-2x=154
2x=154-92
2x=62
x=62:2
x=31
d 28+(x+13)+52=113
(x+13)+80=113
x+13=113-80
x+13=33
x=33-13
x=20
e 12+2x+23=53
2x+35=53
2x=53-35
2x=18
x=18:2
x=9
f 12+(x-15)=63
x-15=63-12
x-15=51
x=51+15
x=66
12+(66-15)=63
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