4.The sum of four and a number is ten The sum means the answer of the two numbers you add or plus(+) So 4 + x =10 5.A number subtracted from twenty is five A number subtracted means you minus(-) the number into another number So x - 20 =5
But if your finding the number the do this 4. 4+x=10 x=10-4 x=6 5. x-20=5 x=20+5 x=25
Answers & Comments
Let x be the number
4.The sum of four and a number is ten
The sum means the answer of the two numbers you add or plus(+)
So 4 + x =10
5.A number subtracted from twenty is five
A number subtracted means you minus(-) the number into another number
So x - 20 =5
But if your finding the number the do this
4. 4+x=10
x=10-4
x=6
5. x-20=5
x=20+5
x=25
Keep learning hope it helps ;)