1. -8 - a + a+23 = -8+23 = 15
1,3 + m + (-4-m) = -2,7
p - m + k + (-p + m + k) = 2k
3,7-2,6+4,2 + (-12,5+2,6-4,2) = 5,3+(-14,1) = -8,8
2. 7x-18x+25x-6x = 8x
-0,3b-1,4b+3,1b+0,7b = -1,7b+3,1b+0,7b = 1,7b+3,8b = -2,1b
11a-16b-18a+9b = -7a-7b
-0,8k+0,9p-1,7k+0,5k+1,4p = -2k+2,3p
3. -4x-8(9-2x) = -4x-72+16x
12x-72 = 0
x = 72/12
x = 6
3) 6(3x-2)+4(5x-1) = 18x-12+20x-4 = 38x-16
x = 16/38
x = 1/2
x = 0,5
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
1. -8 - a + a+23 = -8+23 = 15
1,3 + m + (-4-m) = -2,7
p - m + k + (-p + m + k) = 2k
3,7-2,6+4,2 + (-12,5+2,6-4,2) = 5,3+(-14,1) = -8,8
2. 7x-18x+25x-6x = 8x
-0,3b-1,4b+3,1b+0,7b = -1,7b+3,1b+0,7b = 1,7b+3,8b = -2,1b
11a-16b-18a+9b = -7a-7b
-0,8k+0,9p-1,7k+0,5k+1,4p = -2k+2,3p
3. -4x-8(9-2x) = -4x-72+16x
12x-72 = 0
x = 72/12
x = 6
3) 6(3x-2)+4(5x-1) = 18x-12+20x-4 = 38x-16
x = 16/38
x = 1/2
x = 0,5