zeszyt ćwiczeń matematyka zad.15/118 . rozwiążż równania
a) 0,7x + 1⅕ = 4,5(1-1⅖x) +3
b)⅘(4,5x-6) = -2(⅖x+1)+6+4,4x
c) 2y+⅖(-1,2y-1)- 18/25 (ułamek)y=4(0,32y - 0,22)
d) 0,8 - ⅕ (0,3y-1)=1/25 (ułamek) (y+25) + 0,02y
dam naaajj !
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a) 0,7x + 1⅕ = 4,5(1-1⅖x) +3
0.7x+1.2=4.5(1-1.4x)+3
0.7x+1.2=4.5-6.3x+3
0.7x+1,2=7.5-6.3x
0.7x+6.3x=7.5-1.2
7x=8.7/7
x=1.24
b)⅘(4,5x-6) = -2(⅖x+1)+6+4,4x
0.8(4.5x-6)=-2(0.4x+1)+6+4.4x
3.6x-4.8=-0.8-2+6+4.4x
3.6x-4.8=4.4x+3.2
3.6x-4.4x=3.2+4.8
-0.8x=8/(-0.8)
x=-10
c) 2y+⅖(-1,2y-1)- 18/25 (ułamek)y=4(0,32y - 0,22)
2y+0.4(-1.2y-1)-0.72y=1.28y-0.88
2y-0.48y-0.4-0.72y=1.28y-0.88
0.24y-0.4=1.28y-0.88
0.24y-1.28y=-0.88+0.4
-1.04y=-0.48/(-1.04)
y=0.46
d) 0,8 - ⅕ (0,3y-1)=1/25 (ułamek) (y+25) + 0,02y
0.8-0.2(0.3y-1)=0.04(y+25)+0.02y
0.8-0.06y+0.2=0.04y+1+0.02y
1-0.06y=1+0.06y
-0.06y-0.06y=1-1
-0.12y=0/(-0.12)
y=0
a) 0,7x+ 1,2= 4,5- 2x +3
0,7x+2x = 4,5+3-1,2
2,7x= 6,3 / :2,7
x=2 i 11/27(ułamek)
b)
4/5(4,5x-6)=4/5x+2+6+4,4x
3 i 3/5x-4 i 1/5=4/5x+2+6+4,4x
3 i 3/5-4/5-22/5=8+4/5
1 i 3/5= 12 i 1/5 /: -1 i 3/5
x= -7 i 5/8
c)
2y-12/25y-2/5-18/25y=1 i 7/25y-22/25
50/25y-12/25y-18/25y-32/25y=10/25-22/25
-12/25y=-12/25
y=1
d)
0,8-12/50y-1/5-=1/25y+1+2/100y
-24/100y-4/100y-2/100y=1+1
-30/100=2 /:-30/100
y=-6 i 2/3
Pozdro ^^