- a b – 3ab - C+ 3ab2 - 2a² b + ab
where a = -1, b = -3 and c = = 10:

Step-by-step explanation:

-a b-3ab-C+ 3ab2 - 2a² b + ab

where a = -1, b = -3 and c = = 10:

= -(-1)(-3)-3(-1)(-3)-10+3(-1)(-3)2-2(-1)²(-3)+(-1)(-3)

= -(3)-(3)-10+6(3)-2(3)+3

=-3-3-10+18-6+3

=-22+21

= -1

x = -0.75y

Step-by-step explanation:

Simplifying

3x + 5y + x + -2y = 0

Reorder the terms:

3x + x + 5y + -2y = 0

Combine like terms: 3x + x = 4x

4x + 5y + -2y = 0

Combine like terms: 5y + -2y = 3y

4x + 3y = 0

Solving

4x + 3y = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3y' to each side of the equation.

4x + 3y + -3y = 0 + -3y

Combine like terms: 3y + -3y = 0

4x + 0 = 0 + -3y

4x = 0 + -3y

Remove the zero:

4x = -3y

Divide each side by '4'.

x = -0.75y

Simplifying

x = -0.75y