-2x + 3y - 5x - ( -8y ) + 9y When there are two negative signs one after another, it turns into a positive. -2x + 3y -5x + 8y + 9y Now you need to add up all common numbers. -2x - 5x = -7x 3y + 8y + 9y = 20y
The remaining two numbers don't have a common variable, so they stay separate; -7x + 20y
The answer is <span>−<span>7x</span></span>+<span>20y</span>
Simply like terms <span><span><span><span><span><span>−<span>2x</span></span>+<span>3y</span></span>−<span>5x</span></span>−</span>−<span>8y</span></span>+<span>9y
