7
Expressed algebraically, this is equal to 4(x + 3).
it is 10 times larger (of the number that was multiplied by 10 or added a zero at the end)
((2n + 8)) x 5 = 6n + 12ie 10n + 40 = 6n + 124n = -28n = -7(both equations total -30)
kl
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
6
The sum is the total when numbers are added together, the product is the total when they are multiplied.
17 and 7
there are 12 boys in the class
it is 10 times larger (of the number that was multiplied by 10 or added a zero at the end)
6x + 18 = 4 - x 7x + 18 = 4 7x = -14 x = -2
4(8+2x)=5x+1132+8x=5x+118x-5×=11-323x=-213 3=-7Therefore the number is -7
((2n + 8)) x 5 = 6n + 12ie 10n + 40 = 6n + 124n = -28n = -7(both equations total -30)
Let the number be x: 2(2x+4) = 3x+4 4x+8 = 3x+4 4x-3x = 4-8 x = -4
-313
kl
The way in which numbers are grouped when added or multiplied does not change the sum or product.
7(a+3)