How to solve the equation X-2 / 5 + 40 = 7x-10 / 10

How to solve the equation X-2 / 5 + 40 = 7x-10 / 10

X=168

Find an integer solution of the indefinite equation 7x + 2Y = 1, and write out the expression of all its integer solutions

y=（1-7x）/2
∵ 1-7x must be even to be divisible by 2
Ψ x = 2n + 1 (n ∈ integer)
Ψ y = (1-7x) / 2 = 1 / 2-7 * (2n + 1) / 2 = - 7n-3 (n ∈ integer)

Positive integer solutions of 7x + 2Y = 11

X=1,Y=2
X = 2, y = negative
There is a unique solution

Find the positive integer solution of equation 7x + 4Y = 100
well,

y=25-7x/4=25-2x+x/4
So we have x = 4N > 0
Then y = 25-7n > 0, so n

How to set up the equation of (37 x) × 7 300 = 860

37*7+7x+300=860
7X=860-300-37*7
7x=301
x=43
Children, study hard

The distance between the two buildings is 300 meters. Party A and Party B walk in opposite directions from the door of one building. After 7 minutes, the distance between the two buildings is 860 meters. Party A walks 37 meters per minute, and Party B walks several meters per minute

The two buildings are 300 meters apart. Party A and Party B walk in opposite directions from the door of one building. After seven minutes, the two buildings are 860 meters apart. How many meters does party a walk for each minute and Party B walk for each minute?
Solution: B walks x meters per minute
7x+37×7+300=860
7X+259+300+860
7X=301
X=43
A: B walks 43 meters per minute

One equation, step by step, 480 + (x-480) * 37.5% = (7 / 12) x

480+（x-480）*37.5%=（7/12）x 480＋3/8X-180=7/12X 3/8X+300=7/12X 7/12X-3/8X=300 5/24X=300 X=1440

7x-14 = 5x + 9

7x-14=5x+9
7x-5x=9+14
2x=23
x=23/2

Solving the equation - 3Y + 2 = 2y-3

Transfer items and merge similar items
5y=5
That is, y = 1

Solve the equation 1. X + 3Y / 2 = 3 / 55 (x-2y) = - 42.3y-2x = 4x-y / 3 = - 13. A + B = 5, B + C = 3, a + C = 1
4.x:y:z =1:3 :4 2x+y-z=2
5.x+y+z=5 2x-y-z=4 3x-2y-z=9
Urgent five problem solving equation seeking expert help me to work out five problems

1.5x = 15y = 6, 5x-10y = - 46-15y-10y = - 4Y = 0.4x = 02.3y-2x = 4x-y / 39y-6x = 4x YX = y, 3y-2x = - 1y = - 1x = - 13. A = 1-C is substituted into 1 to get C = B-4, C = B-4 into 2 to get b = 7 / 2, B = 7 / 2 into 1 to get a = 3 / 2C = - 1 / 24. Because X; Y; Z = 1; 3; 4, 4x = Z, 3x = y is substituted into 2