# math

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how many side and angles does a trapezoid angle, hexagon, and pentagon have?
solve each equation:
13 + y = -3, 3y + 8=3, y over 3= -9

need help with + & - rules for adding whole numbers, decimals, fractions and integers ( do not understand) and rule for multiplying + & -

• math -

hint --- hex means 6 and pent means five
13 + y = -3
-----------------
13-13 + y = -16
y = -16
=============================
3y + 8=3
---------------
3 y + 0 = -5
y = -5/3
=============================
y over 3= -9
3 (y/3) = 3 (-9)
y = -18

• math -

sorry i do not understand. this is 6th grade math. i am suppose to solve for y. not change what it is equal to.
13 + y = -3

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