Rozwiąż równania .
a)5(x-7)+2=-28
b)5=4(x-2)+9
c)2(x-1)+3(x+1)=26
d)4(3-x)+9=7(2+x)+29
e)2(x-3)+3(x-4)+4(x-5)=0
f)5x-2=5(x-2)
g)6x-3x-2x=x+1
h)8x+5=2(4x+2,5)
i)3x+6=6x+3
j)9=5x+6-5(x-0,6)
Z góry thx : )
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5(x-7)+2=-28
5x-35+2=-28
5x=-28+35-2
5x=5/5
x=1
=================
5=4(x-2)+9
5=4x-8+9
5-9+8=4x
4=4x/4
x=1
===============
2(x-1)+3(x+1)=26
2x-2+3x+3=26
5x=26+2-3
5x=25/5
x=5
=================
4(3-x)+9=7(2+x)+29
12-4x+9=14+7x+29
-4x-7x=14+29-12-9
-11x=22/-11
x=-2
==================
2(x-3)+3(x-4)+4(x-5)=0
2x-6+3x-12+4x-20=0
2x+3x+4x=6+12+20
9x=38/9
x=42/9
==================
5x-2=5(x-2)
5x-2=5x-10
5x-5x=-10+2
0=-8 równanie sprzeczne
==========================
6x-3x-2x=x+1
x-x=1
0=1 równanie sprzeczne
=============================
8x+5=2(4x+2,5)
8x+5=8x+5
8x-8x=5-5
0=0
=====================
3x+6=6x+3
3x-6x=3-6
-3x=-3/-3
x=1
===================
9=5x+6-5(x-0,6)
9=5x+6-5x+3
9-6-3=5x-5x
0=0
===================