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LikeFist
@LikeFist
August 2022
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Решите уравнения
а) 3 ( x-2) + 5 (7-x)=4
б) 0.8 (2y+3) - 1.2 (3y-4) = 0.6
г)2.3 (5-3m) + 7.6 (m-2) = -1.6
Решите уравнение
а)3.1 (2-x) + 4.5= 7.2 - 4.3 (-3.7+x)
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Answers & Comments
UrsulaSchneider
A)3(x-2)+5(7-x)=4
3x-6+35-5x=4
-2x+29=4
-2x=4-29
-2x=-25
x=12,5
б)0,8(2y+3)-1,2(3y-4)=0,6
1,6y+2,4-3,6y+4,8=0,6
-2y+7,2=0,6
-2y=0,6-7,2
-2y=-6,6
y=-3,3
г)2,3(5-3m)+ 7,6(m-2)=-1,6
11,5-6,9m+7,6m-15,2=-1,6
-3,7+0,7m=-1,6
0,7m=-1,6+3,7
0,7m=2,1
m=3
a)3,1(2-x)+4,5=7,2-4,3(-3,7+x)
6,2-3,1x+4,5=7,2+15,91-4,3x
-3,1x+10,7=23,11-4,3x
-3,1x+4,3x=23,11-10,7
1,2x=12,41
x=14,195
1 votes
Thanks 1
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Answers & Comments
3x-6+35-5x=4
-2x+29=4
-2x=4-29
-2x=-25
x=12,5
б)0,8(2y+3)-1,2(3y-4)=0,6
1,6y+2,4-3,6y+4,8=0,6
-2y+7,2=0,6
-2y=0,6-7,2
-2y=-6,6
y=-3,3
г)2,3(5-3m)+ 7,6(m-2)=-1,6
11,5-6,9m+7,6m-15,2=-1,6
-3,7+0,7m=-1,6
0,7m=-1,6+3,7
0,7m=2,1
m=3
a)3,1(2-x)+4,5=7,2-4,3(-3,7+x)
6,2-3,1x+4,5=7,2+15,91-4,3x
-3,1x+10,7=23,11-4,3x
-3,1x+4,3x=23,11-10,7
1,2x=12,41
x=14,195