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Q: What is 28 plus z equals 56?

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6z + 28 = 12z + 10 18 = 6z 3 = z

-6z + 2 = 3z + 4z + 28 Add 6z to both sides: 2 = 3z + 4z + 28 + 6z = 28 + 13z Subtract 28 from both sides: - 26 = 13z Divide both sides by 13: -2 = z

4 x z = 28 z = 28/4 z = 7

z remains undefined.

3x + 2 = 82

Can you help with this equation? Thanks. Solve for x and y and z for the following. x plus y plus z equals 9 x plus 2y plus 3z equals 23 x plus 5y plus -3z equals -7

89

The solution is (x, y, z) = (2.5, 1, 2.5).

4.34684352143

It is a linear equation in the variable z.

What is the number of integral solution to x plus y plus z equals 100?

No.

(z=-3) and (z=7)

10

6z+28=12z+10 6z-12z=10-28 addition property of equality. -6z=-18 simplification z=3 multiplication property of equality.

z = -80

-2

9z

57 + z = 97 z = 97 - 57 z = 40

z = -4 x-5 y+2

z = -2

z = 3.6

0.3829 approx.

x + y + z = x + z + y is the commutative property of addition.

2 times 28 equals 56, 4 times 14 equals 56, 7 times 8 equals 56.