Why is the first step when solving
2x – 15 - 4x = 3 to combine like terms?

-9 is the final answer

Step-by-step explanation:

2x-4x=-2x

so the equation would be -2x-15=3

add 15 to both sides -2x=18

divide both sides by -2

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees

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