Answer:
Q1. 20x = 200. The value of x is 10
Q2. 7 - 3x = 1. The value of x is 2.
Step-by-step explanation:
In order to find an equation, you have to let the number be any variable, such as m or n or z. So I will let the number be x variable. Then the question says a number is multiplied by 20 is equals to 200 :
Let number = x,
[tex]x \times 20 = 200[/tex]
[tex]20x = 200[/tex]
[tex]20x \div 20 = 200 \div 20[/tex]
[tex]x = 10[/tex]
Same for the next question. Given that a number multiplied by 3 :
Let number = x,
[tex]x \times 3 = 3x[/tex]
Then subtracted by 7 equals to 1 :
[tex]7 - 3x = 1[/tex]
[tex]7 - 3x - 7 = 1 - 7[/tex]
[tex] - 3x = - 6[/tex]
[tex] - 3x \div - 3 = - 6 \div - 3[/tex]
[tex]x = 2[/tex]
