The statement is totally false.
because (P and ¬P) is a contradiction.
<h2><u>Correct question</u> : 4x - 3 = 2x + 7 </h2>
<h2><u>Solution</u> : 4x - 3 = 2x + 7 </h2>
<h2>•••••••••••••••••••••••••••••••••••••••</h2>
<h2><u>Correct Question</u> : 2x + 6 = 7x - 14</h2>
<h2><u>Solution</u> : 2x + 6 = 7x - 14</h2>
Let x be the total price. And you paid 75% of it which is $135.
x * 75/100 = 135
x = 180
You would have paid $180 if you had not used coupons.
It is just asking how many meters tall are doors usually at. Clearly 30 meters isn't reasonable so just say how tall most doors are in meters.