Let the number be x.
7x-x=42
6x=42
x=7
the number is 7
1500-125=1,375
so 1375 should be your answer.
Answer:
x= 12 or x = -12
Step-by-step explanation:
|x| means take the positive value of x
|x| =12
We make two equations one positive and one negative
x= 12 or x = -12
We can write that 40% of the full amount is 30 marks.
Using x for the full amount, we can say 0.4x=30.
To solve for x, we devide both sides by 0.4 (or equivalently, multiply by 2.5).
We get x = 75 marks.