It is known that the area of a trapezoid is 42cm and its height is 6cm, and its upper bottom is 1cm less than 2 times of its lower bottom?

It is known that the area of a trapezoid is 42cm and its height is 6cm, and its upper bottom is 1cm less than 2 times of its lower bottom?

The area is 42cm and the height is 6cm
Upper bottom + lower bottom = 42 / 6 * 2 = 14
Upper sole = lower sole * 2-1
Let the upper bottom be x and the lower bottom be y
x+y=14
x=2y-1
x=9
y=5
The top of trapezoid is 9cm and the bottom is 5cm

The area of trapezoid is 42cm square, the height is 6cm, and the bottom is 1cm less than 2 times of the top
Do not solve, as long as the equation. Binary linear or equations
1) The area of trapezoid is 42cm square, the height is 6cm, and the bottom is 1cm less than 2 times of the top
also
2) There are two kinds of notebook, big and small, three big and two small, for 14.5 yuan, two big and four small, for 15 yuan
As long as the equation is not solved

Top bottom x bottom bottom y
(x+y)6=42
2y-x=1
Big X Small y
3x+2y=14.5
2x+4y=15

It is known that the area of trapezoid is 42 cm 2, the height is 6 cm, and its bottom is 1 cm less than 2 times of the top

According to the meaning of the question, we get y = 2x − 112 (x + y) × 6 = 42, and the solution is x = 5Y = 9. A: the upper bottom of the trapezoid is 5cm, and the lower bottom is 9cm