8.1/3-y=0.3; 2)4(x-2)+2(x+3)=-10; 3)4(3x+10)+2.5(6-10x)=0 4)(x-7)=0 5)6-2x=3x+6 6)3.2y+1.5=1.6(2y+1) 7)4.5x+3=6x+7/2. Created by barbi2001. matematika-ru

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barbi2001 @barbi2001

July 2022 1 9 Report

8.1/3-y=0.3; 2)4(x-2)+2(x+3)=-10; 3)4(3x+10)+2.5(6-10x)=0 4)(x-7)=0 5)6-2x=3x+6 6)3.2y+1.5=1.6(2y+1) 7)4.5x+3=6x+7/2

Answers & Comments

nellika01 8.1/3-y=0.3;
у=25/3-3/10
у=250/30-9/30
у=241/30
у=8 1/30

2)4(x-2)+2(x+3)=-10;
4х-8+2х+6=-10
6х-2=-10
6х=-8
х=-8/6
х=-1 1/3

3)4(3x+10)+2.5(6-10x)=0
12х+40+15-25х=0
-13х=-55
х=55/13
х=4 3/13

4)(x-7)=0
х=7

5)6-2x=3x+6
5х=0
х=0
6)3.2y+1.5=1.6(2y+1)
3.2у-3.2у=1.6-1.5 тут что то не то в условии

7)4.5x+3=6x+7/2
4.5х-6х=3 1/2 -3
-1 1/2 х=1/2
х=1/2:(-3/2)
х=-1/3

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