Mathematically written:
3 * x + 7 = 25
3x + 7 = 25
3x = 25 - 7
3x = 18
x = 18 / 3
x = 6
Proof:
3 * 6 + 7 = 25
18 + 7 = 25
25 = 25 → both sides of the equation are equal, our answer is correct
Notes:
A number - Is an unknown number, called a variable, which in this case is substituted by the letter x.
Hope it helped,
BioTeacher101
What do you mean? In the order of operations exponents would be 2nd (pemdas) parentheses, exponents, multiplication,division, addition, subtraction
Answer:
Part a) of fabric
Part b) of thread
Step-by-step explanation:
we know that
A seamstress uses centimeters of thread for every centimeters of fabric
Part a)
by proportion
Find how much fabric is involved if the seamstress uses centimeters of thread
Part b)
by proportion
Find how many centimeters of thread is needed if the seamstress is working with centimeters of fabric
Attached the solution and work.
Answer:
21
Step-by-step explanation:
3×7=21
21 cm² or 21 sq cm