Which pair of expressions below are equivalent (the same)? 1. 2(9x) and 11x
2. 8x + 5x and 40x
3. 3(6x + 1) and 21x
4. 2x + x + x and 4x

Please help it’s a test

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,