What is 7x equal to?

What is a number system originating in India? How do you solve this linear equation 4x-7y equals -4 x plus y equals 0? How many Kelvins are in -273 Celsius? Who invented simultaneous equations? Is 5.375 percent equal to five and one eighths? Frances drew ABC and DEF so that A D AB 4 DE 8 AC 6 and DF 12. Are ABC and DEF similar? What African country produces two thirds of the words vanilla? What is 7 multipied by 7 over 8 equals to? What word can be put in front of 'out' to form a new word? A mathematical representation of an object or event is? WHAT IS 10 percent OF 330? Round 907.457 to the nearest tens ten place? How much cement mixture will it take to cover three square feet at three inches deep? Is 738 closer to 700 or 800? What is 22.47 divide by 0.7? How many yards in 84 feet? Can you show what a line of symmerty is please? What factors does the choice of a length-measuring device depend? How many syllables does agony have? How many and what type of solutions does the quadratic function x2 -10x plus 25 equals 0 have?