1200=800+200y-300y

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Solution for 1200=800+200y-300y equation:


Simplifying
1200 = 800 + 200y + -300y

Combine like terms: 200y + -300y = -100y
1200 = 800 + -100y

Solving
1200 = 800 + -100y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '100y' to each side of the equation.
1200 + 100y = 800 + -100y + 100y

Combine like terms: -100y + 100y = 0
1200 + 100y = 800 + 0
1200 + 100y = 800

Add '-1200' to each side of the equation.
1200 + -1200 + 100y = 800 + -1200

Combine like terms: 1200 + -1200 = 0
0 + 100y = 800 + -1200
100y = 800 + -1200

Combine like terms: 800 + -1200 = -400
100y = -400

Divide each side by '100'.
y = -4

Simplifying
y = -4

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