If a^2+14a=51 and a>0, what is the value of a+7 ?
It rained so much that the streets were.... a) arid b) crowded c) flooded d) dry
The answer is c) flooded because a) arid and d) dry, both mean the opposite of wet, and b) crowded doesn't fit the sentence.
What is the value of x when 2x + 3 = 3x – 4 ?
You subtract the 2x from both sides, which gives you 3=x-4. Now add the 4 to both sides and get the answer x=7.