# cross-multiply

### 1/n + 2/n + 3/n + 4/n = 1

1/n + 2/n + 3/n + 4/n = 1 10/n = 1 Cross multiply: n * 1 = 10 n = 10
Thread by: math_celebrity, Jan 13, 2023, 0 replies, in forum: Calculator Requests

### 3n/5 = 1

3n/5 = 1 Cross multiply: 3n = 5 * 1 3n = 5 Divide each side by 3: 3n/3 = 5/3 n = 5/3
Thread by: math_celebrity, Jan 12, 2023, 0 replies, in forum: Calculator Requests

### n/11 = 11

n/11 = 11 Cross multiply: n = 11 * 11 n = 121
Thread by: math_celebrity, Jan 12, 2023, 0 replies, in forum: Calculator Requests

### -n/8 = 80

-n/8 = 80 Cross multiply: -n = 80 * 8 -n = 640 Multiply each side by -1: -1 * -n = -1 * 640 n = -640
Thread by: math_celebrity, Jan 12, 2023, 0 replies, in forum: Calculator Requests

### 1/10n = 100

1/10n = 100 Cross multiply: n = 100 * 10 n = 1000
Thread by: math_celebrity, Jan 12, 2023, 0 replies, in forum: Calculator Requests

### At the 2002 Winter Olympics, Austria won 2 gold medals. This was 1/8 of the total medals Austria won

At the 2002 Winter Olympics, Austria won 2 gold medals. This was 1/8 of the total medals Austria won. How many did Austria win? Let t be the...
Thread by: math_celebrity, Jan 8, 2022, 0 replies, in forum: Calculator Requests

### 9 divided by the sum of x and 4 is equal to 6 divided by x minus 4

9 divided by the sum of x and 4 is equal to 6 divided by x minus 4. Build our two algebraic expressions first: 9 divided by the sum of x and 4...
Thread by: math_celebrity, Aug 7, 2020, 0 replies, in forum: Calculator Requests