To simplify the expression 2x + 3y + 4x + 9y, you first combine like terms. Adding the coefficients of x terms gives 2x + 4x = 6x. Similarly, adding the coefficients of y terms gives 3y + 9y = 12y. Therefore, the simplified expression is 6x + 12y.
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2x + 3y + 4x + 9y = 2x + 4x + 3y + 9y = 6x + 12y
which can be simplified to 6(x + 2y)
6x + 3y + 6y - 2x = (6x - 2x) + (3y + 6y) = 4x + 9y
9y - 4x
It is equivalent to 3(4x+3y) when factored
4y + 3w + 4x + 9y + 7x - 7w (combine like terms)-4w + 11x + 13y
12y+3=9y-15 3y=-18 y=-6