Answer:
x = 9
Explanation:
If m<1 and m<2 are complementary, then we can add the values together to equal 90.
3x + 10 + 6x - 1 = 90
Combine like terms: 9x + 9 = 90
Subtract 9 from both sides 9x = 81
Divide both sides by 9 to get x = 9
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