(1) four times of a number minus the sum of 2.8 and 5.4, the difference is 23. What is the number? (2) The sum of 4 times of a number plus 0.9 times 3 is 6.7. Find the number. (3) one number is half larger than 7.5, and the other is 0.7 smaller than nine tenths. What is the difference between the two numbers?
4X - (2.8 + 5.4) = 23, x = 7.8
4X + 0.9 * 3 = 6.7, the solution is x = 1
The first number & nbsp; = & nbsp; 7.5 + 1 / 2 & nbsp; = 8
The second number & nbsp; = & nbsp; 9 / 10 & nbsp; - & nbsp; 0.7 & nbsp; = & nbsp; 0.2
1. The number a is 26.8, 2.6 less than three times the number B. what is the product of the two numbers?
Let B be x, then 3x-2.6 = 26.8
3X=26.8+2.6=29.4
X=9.8
26.8*9.8=26.8*(10-0.2)=268-5.36=262.64
The product of a and B is 7.26. If a is increased by 0.5, then the product is 8.36. What is the sum of a and B?
emergency
The number of B is (8.36-7.26) / 0.5 = 2.2
The number of a was 7.26 / 2.2 = 3.3
The sum is 2.2 + 3.3 = 5.5
4 times of a number plus the product of 8 and 3.2. The sum is 30. Find the number
Let this number be X
4x+8*3.2=30
4x+25.6=30
4x=4.4
x=1.1
This number is 1.1