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Iannisian
a fost răspuns

a) 4x+7+5(x+3)=2×+1
b) 5(x+2)+3×=7+5×
c) 5(x-1)+3×-4=3×+11
d) 4(×+3)+2(x-5)=3x+11
e) 3x+9+2(3-x)=4+2(x+5)
ajutor

Răspuns :

Togoeradu
a. 4x+7+5(x+3)=2x+1
4x+7+5x+15=2x+1
9x+22=2x+1
9x-2x=-22+1
7x=-21
x=(-21)/7
x=(-3)
b.5(x+2)+3x=7+5x
5x+10+3x=7+5x
8x+10=7+5x
8x-5x=(-10)+7
3x=(-3)
x=(-1)
c.5(x-1)+3x-4=3x+11
5x-5+3x-4=3x+11
8x-9=3x+11
8x-3x=9+11
5x=20
x=20/5
x=4
d. 4(x+3)+2(x-5)=3x+11
4x+12+2x-10=3x+11
6x+2=3x+11
6x-3x=-2+11
3x=(-9)
x=3
e.3x+9+2(3-x)=4+2(x+5)
3x+9+6-2x=4+2x+10
x+15=2x+14
x-2x=-15+14
-x=-1
x=1

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