What is 42 times (- 2 / 3) + (- 3 / 4) divided by (- 1 / 4) Now?

=-28+3=25

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2. Divide 3 / 4 by 2.84 and divide 3 / 5 by 3 (1 / 2 by 1.42) and multiply 1 / 5 by 4
3. A number divided by 20 and so on, 12 is more than 17
4. 40% of a number is 5 / 6 of 48. What's the number? Multiply a number by 6, subtract 6, and then divide by 6. The result is still 6. Find this number! I'm in a hurry to use the equation
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7. What is the quotient of 0.7 divided by the sum of 16 and 1.4
8. What is the quotient of 0.7 divided by the sum of 16.8 and 1.4
9. The quotient of 2.7 divided by X is equal to that of 16 divided by 0.9
10. 36 out of 45 = 32 divided by []
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12. 1 divided by (2 times 6) + 1 divided by (6 times 10) + 1 divided by (10 times 14) +. + 1 divided by (42 times 46)=
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14. 7 out of 72 divided by 14 out of 39 multiplied by 24 out of 91
15. Negative 1 and 1 / 4 divided by 0.125 divided by (- 16)?
16. Simplification: (5x + 7) - (4x + 0.18)
17. Simplify 6A + 13a 6x-28-2.5x + 30.58a - (5a + 8) (5x + 7) - (4x + 0.18)
18. What is the simplification of 6x-28-2.5x + 30.5? What is the simplification of 8A - (5a + 8)? What is the simplification of (5x + 7) - (4x + 0.18)?
19. Equation: 42x + 25X = 13413 (x + 5) = 169 1.42x+25x=134 2.13（x+5）=169
20. Solving the equation a ^ 2-2x / 2x + 1 + A ^ 2 + 2x / 2x-1 = 2 (a ^ 4-1) / 4x ^ 2-1 about X