exam Maths Puzzle Numerical Ability

Write 2x - 6y - 3 = 0 in double-intercept form.

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exam Other Question

Add thirty-eight and nine tenths, five and fifty-eight hundredths, seven, and fifteen and eight tenths.

OK I was wrong I have one more problem that I cannot grasp. Help please.
Write as a mixed number.140 1/2%