Реши уравнения: (y+1)x18 =36+12 x (y+1) (k+5)x7-54= (k+5)x4 17 x (c-2) - 36 = 19+ (c-2) x12 - id236090220201016 от POMOGIf 16.10.2020 03:46

Question

Математика: Реши уравнения: (y+1)x18 =36+12 x (y+1) (k+5)x7-54= (k+5)x4 17 x (c-2) - 36 = 19+ (c-2) x12

POMOGIf · Accepted Answer

-8n-(4n-6k)=-8n-4n+6k=-12n+6k=6k-12n=k-2n=11
a)-2х+16=5х+30
-2x-5x=-16+30
-7x=14
x=14:(-7)
x=-2.
б)11m-7=-22+5m
11m-5m=-22+7
6m=-15
m=-15:6
m=2,5.
в)2,8-3,2a=-4,8-5,1a
-3,2a+5,1a=-2,8-4,8
1,9a=-7,6
a=-7,6:1,9
a=4.
г) 0,893х-6,54=0,894х-3,78
-6,54+3,78=0,894x-0,893x
-2,76=0,001x
x=-2,76:0,001
x=-2760
д)3 1/4х-4 5/7=3 5/12х-3 3/14
3 1/4x-3 5/12x=-3 3/14+4 5/7
3 3/12x-3 5/12x=-3 3/14+4 10/14
-2/12x=1 7/14
-1/6x=1 1/2
x=1 1/2 : -1/6
x=3/2 : -1/6
x=-(3*6/2*1)
x=-9.
е)5/12-7/9у=10 5/12-3у
-7/9y+3y=10 5/12-5/12
2 2/9y=10
y=10:2 2/9
y=10*9/1*2
y=45.

Реши уравнения: (y+1)x18 =36+12 x (y+1) (k+5)x7-54= (k+5)x4 17 x (c-2) - 36 = 19+ (c-2) x12

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