Пошаговое объяснение:
193
1)
9 (7x - 6) - 18x = 63x - 18x - 54 = 45x - 54
2)
7a - 6(19 - a) = a - 114
3)
0,8(6x - 2) + 1,6(x - 2) = 6,4x - 4,8
4)
2,8(5b - 6a) - (7b - 8a)*1.2 = 14b - 16,8a - 8,4b + 9,6a = 5,6b - 7.2a
5)
- (- 4,9 - 5,8c) - (3,1c - 5,6) = 4,9 + 5,8c - 3,1c + 5,6 = 10,5 + 2,7c
6)
8/9(8/9a - 3/4b) - 7/30(30/7a - 60/7b) = a - 2/3b - a + 2b = 4/3b
194
6a - (3a - 9b) = 3a + 9b = 3 (a + 3b) = 3 * (- 0,6) = - 1,8
195
y = 30/13
0,6(4y - 18) - 0,4(5 - 7y) = 2,4y - 10,8 - 2 + 2,8y = 5,2y - 12,8 = 13*0.4y - 12,8 = 12 - 12,8 = 0,8
c = - 2/5
21/4(12 - c) + 13/4(- c - 8) = 63 - 21/4c - 13/4c - 26 = 37 - 34/4c = 37 + 3.4 = 40,4
1) 9(7x-6)-18x=63x-54-18x=45x-54
2)7a-6(19-a)=7a-114+6a=13a-114
3)0,8(6x-2)+1,6(x-4)=4,8x-1,6+1,6x-6,4=6,4x-8
4)2,8(5b-6a)-(7b-8a)*1,2=14b-15a-8,4b+9,6a=5,6b-5,4a
5)-(-4,9-5,8c)-(3,1c-5,6)=4,9+5,8c-3,1c-5,6=2,7c-0,7
a+3b= -0,6
6a-(3a-9b)=3a+9b=3(a+3b)=3(-0,6)= -1,8
1) y=
0,6(4y-18)-0,4(5-7y)=2,4y-10,8-2+2,8y=5,2y-12,8=
2)c= -0,4
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Пошаговое объяснение:
193
1)
9 (7x - 6) - 18x = 63x - 18x - 54 = 45x - 54
2)
7a - 6(19 - a) = a - 114
3)
0,8(6x - 2) + 1,6(x - 2) = 6,4x - 4,8
4)
2,8(5b - 6a) - (7b - 8a)*1.2 = 14b - 16,8a - 8,4b + 9,6a = 5,6b - 7.2a
5)
- (- 4,9 - 5,8c) - (3,1c - 5,6) = 4,9 + 5,8c - 3,1c + 5,6 = 10,5 + 2,7c
6)
8/9(8/9a - 3/4b) - 7/30(30/7a - 60/7b) = a - 2/3b - a + 2b = 4/3b
194
6a - (3a - 9b) = 3a + 9b = 3 (a + 3b) = 3 * (- 0,6) = - 1,8
195
1)
y = 30/13
0,6(4y - 18) - 0,4(5 - 7y) = 2,4y - 10,8 - 2 + 2,8y = 5,2y - 12,8 = 13*0.4y - 12,8 = 12 - 12,8 = 0,8
2)
c = - 2/5
21/4(12 - c) + 13/4(- c - 8) = 63 - 21/4c - 13/4c - 26 = 37 - 34/4c = 37 + 3.4 = 40,4
Пошаговое объяснение:
193
1) 9(7x-6)-18x=63x-54-18x=45x-54
2)7a-6(19-a)=7a-114+6a=13a-114
3)0,8(6x-2)+1,6(x-4)=4,8x-1,6+1,6x-6,4=6,4x-8
4)2,8(5b-6a)-(7b-8a)*1,2=14b-15a-8,4b+9,6a=5,6b-5,4a
5)-(-4,9-5,8c)-(3,1c-5,6)=4,9+5,8c-3,1c-5,6=2,7c-0,7
6)
194
a+3b= -0,6
6a-(3a-9b)=3a+9b=3(a+3b)=3(-0,6)= -1,8
195
1) y=
0,6(4y-18)-0,4(5-7y)=2,4y-10,8-2+2,8y=5,2y-12,8=
2)c= -0,4