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Sc270390
a fost răspuns

5×(4x+7)-32=63
7×(3x-5)+23=114
9×(5-3x)+71=89
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Răspuns :

CurrerBell
5x(4x+7)-32=63
5x(4x+7) = 63+32 
5x( 4x+7) = 95 
4x+ 7 = 95 :5 
4x + 7 = 19
4x = 19 - 7
4x = 12
x = 12:4
x=3 

7x(3x-5)+23=114
7x( 3x-5) = 114 - 23 
7x ( 3x-5) =91
3x-5=91:7
3x-5 = 13
3x=13+5
3x=18
x=18:3
x=6

9x(5-3x)+71=89
9x( 5-3x) = 89-71
9x(5-3x) = 18
5-3x=18:9
5-3x=2
3x = 5-2
3x = 3
x = 1 
Oanadancea2001
20x+35-32=63; 20x=63-35+32=60;x=3
21x-35+23=114;21x=114+35-23=126;x=126:21=6
45-27x+71=89;27x=45+71-89=27; x=1

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