**Weegy:** the answer for the given system is {(2, 1)}

**User:**
One number is eight more than twice another. If their difference is 25, what is the larger number?
17
42
35

**Weegy:** The larger number is 42 First find the smaller number: 2n+8-n=25 n+8=25 n=17 To find the larger number: 2n+8=2(17)+8 = 42

**User:**
A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?
10
8
9

**Weegy:** d + n = 17
0.1d + 0.05n = 1.25
d = 17 - n
0.1 (17 - n) + 0.05n = 1.25
1.7 - 0.1n + 0.05n = 1.25
1.7 - 0.05n = 1.25
-0.05n = -0.45
n = 9
9 Nickels, 8 Dimes

**User:**
The length of a rectangle is 3 inches more than its width, and its perimeter is 22 inches. Find the width of the rectangle.
4 in.
5 in.
7 in.

**Weegy:** Let x be its width, then its length is (x + 3). perimeter = 2x + 2(x + 3) = 22, solve the equation we get x = 4. Its width is 4 inches.

**User:** Simplify.
(-5.12) - (-4.7) + (7.021)

**Weegy:** (-5.12) - (-4.7) + (7.021) = -5.12 + 4.7 + 7.021; = 6.601

**User:** Find the value of 7 + 32 (-5 + 1) ÷ 2.

**User:** Evaluate.
-|-7 + 3|

**User:** Evaluate -3x 3 - 4x for x = -1.

**Weegy:** -3x^3 - 4x for x = -1 -3(-1)^2 - 4(-1) -3(-1) + 4 = 1

**User:** What is the algebraic expression for "the difference between seven times a number and three times that number"?

**User:** Simplify 2(x - 3) + 7(x + 2).

**User:** Simplify 18 - 2[x + (x - 5)].

**Weegy:** (x - 4)(x + 3) = x^2 + 3x - 4x - 12 = x^2 - x - 12

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