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Answer:
3x − 49
Step-by-step explanation:
Replace all occurrences of ++−- with a single −. A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because 1⋅−1=−1
1 + 5(3x − 10) − 12x
Apply the distributive property.
1 + 5(3x) + 5 x −10 − 12x
Multiply 3 by 5.
1 + 15x + 5 x −10 − 12x
Multiply 5 by −10.
1 + 15x − 50 − 12x
Simplify by adding terms
Subtract 50 from 1.
15x − 49 − 12x
Subtract 12x from 15x.
Answer: 3x − 49