How do combine like terms 3[x plus 3y] minus 5[x minus y?

3(x + 3y) - 5(x-7)

Use the distributive prop. to simplify

3x + 9y - 5x - 35

Use The assoc. prop to move them around.

3x - 5x + 9y - 35

combine like terms

-2x + 9y - 35

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

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step-by-step explanation: