Find the number by translating the sentence into an equation, and then solving t

Question

Find the number by translating the sentence into an equation, and then solving the equation. Three more than the product of two and a number is -21. Find the number. Find the number by translating the sentence into an equation, and then solving the equation. Twice the difference of a number and 2, is -30. Find the number. Solve by representing one unknown by a variable and the other using a variable expression using the same variable, translate into an equation, solve, and state your conclusion. The average life expectancy for a whale is 10 years longer than four times the life expectancy of a cockatoo. If the total of these life expectancies is 260 years, find the life expectancy of each.

Explanation / Answer

9) let number be x

3+ 2x =-21

2x=-21-3

2x=-24

x=-24/2

x=-12

number is -12

10)let the number be x

2(x-2)=-30

x-2=-30/2

x-2=-15

x=-15+2

x=-13

number is -13

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