Ответ:
Объяснение:
a) x-8>>2x+1+7, -x>>16, x<<-16, отв -16
b) x^2+3x>x^2+4x+3, -x>3, x<-3, отв. -4
с)умножаем все на 70 и сокращаем,
14(3x-1)-35(x+1)<70-10x, 42x-14-35x-35<70-10x,
17x<119, x<7 \\\\\\\\\\\\\(7)_______, отв 6
a) x-8≥2(x+½)+7
x-8≥2x+1+7
x-8≥2x+8
x-2x≥8+8
-x≥16
x≤-16
b) x(x+3)>(x+1)(x+3)
x²+3x>x²+4x+3
x²+3x-x²-4x>3
-x>3
x<-3
c) (3x-1)/5-(x+1)/2<1-x/7
2(3x-1)/10-5(x+1)/10<1-x/7
(6x-2-5x-5)/10<7/7-x/7
(x-7)/10<(7-x)/7
(70*(x-7))/10<(70*(7-x))/7
7*(x-7)<10*(7-x)
7x-49<70-10x
7x+10x<70+49
17x<119
x<119/17
x<7
d) (9x+2)/10-(10x-2)/9>2
(9*(9x+2)-10*(10x-2))/90>2
(81x+18-100x+20)/90>2
(-19x+38)/90>2
(90*(-19x+38))/90>2*90
-19x+38>180
-19x>180-38
-19x>-142
x<-142/19
x<-7 9/19
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
Объяснение:
a) x-8>>2x+1+7, -x>>16, x<<-16, отв -16
b) x^2+3x>x^2+4x+3, -x>3, x<-3, отв. -4
с)умножаем все на 70 и сокращаем,
14(3x-1)-35(x+1)<70-10x, 42x-14-35x-35<70-10x,
17x<119, x<7 \\\\\\\\\\\\\(7)_______, отв 6
Ответ:
a) x-8≥2(x+½)+7
x-8≥2x+1+7
x-8≥2x+8
x-2x≥8+8
-x≥16
x≤-16
b) x(x+3)>(x+1)(x+3)
x²+3x>x²+4x+3
x²+3x-x²-4x>3
-x>3
x<-3
c) (3x-1)/5-(x+1)/2<1-x/7
2(3x-1)/10-5(x+1)/10<1-x/7
(6x-2-5x-5)/10<7/7-x/7
(x-7)/10<(7-x)/7
(70*(x-7))/10<(70*(7-x))/7
7*(x-7)<10*(7-x)
7x-49<70-10x
7x+10x<70+49
17x<119
x<119/17
x<7
d) (9x+2)/10-(10x-2)/9>2
(9*(9x+2)-10*(10x-2))/90>2
(81x+18-100x+20)/90>2
(-19x+38)/90>2
(90*(-19x+38))/90>2*90
-19x+38>180
-19x>180-38
-19x>-142
x<-142/19
x<-7 9/19