yes
A positive number added to another positive number always results in a positive sum.
a+3
By studying a lot.
a + 6
4x plus 7
X + X + X + X = 4x It is the same as 4 x X = 4x Think numbers . 3 + 3 + 3 + 3 = 12 = 4(3) or 4 x 3 = 12 = 4(3) In mathematics instead of writing a 'string of plusses(+), it is easier to write the number of plusses multiplied to the given number.
4x
They are called plus and minus - no difference there!
3c
1. With boolean algebra, 1 + n is always equal to 1, no matter what the value of n is.
If this is algebra then; 3x plus 12x = 15x
algebra identies