There are three terms in the given expression
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Collect like terms: 2x + 3y + 3y - 5 - 6 2x + 6y - 11
2x + 3y - x + 5y combine the like terms 2x - x + 3y +5y simple arithmetic x + 8y
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.
3y + 4z + 12y = 3y -3y -3y ------------------------- 4z + 12y = 0 divide everything by 4 z + 3y = 0 -3y -3y z = -3y