Try solving the following problem: In a class of 40 students, 17 have ridden an airplane, 28 have ridden a boat. 10 have ridden a train, 12 have ridden both an airplane and a boat. 3 have ridden a train only and 4 have ridden an airplane only. Some students in the class have not ridden any of the three modes of transportation and an equal number have taken all three.
b. How many students have taken only the boat?
the first one is 6 +6 secoend one is 70 + 4
answer: 520 meters
find how far is 80 steps
now multiply 5200 by 10
so your school is 52000cm far from your house
now let's convert 52000 cm by meter.
therefore your school is 520m far from your house
since the answer is positive 2x+5 it means that the number that been added to 3x-9 is negative,that's why the answer that i know is -x+14.if you add -x to 3x the answer is positive 2x because the sign of the greater number is positive.then positive 14 is the number that you should add to -9 to obtain positive five,because the sign of the larger number is positive.
the answer is -67 because it has a negative on the number then i just search on google then maybe you should too its mich easy