1) 23,4 - (-5,6 + 7,4) + (-13,6 - 1)
2) x - 1 + (x+2) = - 4(-5 - x) - 5
3) -40 • (-7x + 5) = -1600
4) -9x - 8 = -8x
5) 6(5 - 3x) = -8x - 7
6) x - x/3 = - 10/3
7) 6 + (x - 7) = 20
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2) x - 1 + (x+2) = - 4(-5 - x) - 5
3) -40 • (-7x + 5) = -1600
4) -9x - 8 = -8x
5) 6(5 - 3x) = -8x - 7
6) x - x/3 = - 10/3
7) 6 + (x - 7) = 20
ПОМОГИТЕ, СРОЧНО!!
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Ответ:
1) 23.4 - (-5.6 + 7.4) + (-13.6 - 1) = 29.8
2) Solve for x: x - 1 + (x+2) = -4(-5 - x) - 5. Answer: x = -12
3) Solve for x: -40 • (-7x + 5) = -1600. Answer: x = 7
4) Solve for x: -9x - 8 = -8x. Answer: x = -8
5) Solve for x: 6(5 - 3x) = -8x - 7. Answer: x = -2
6) Solve for x: x - x/3 = -10/3. Answer: x = -5
7) Solve for x: 6 + (x - 7) = 20. Answer: x = 21