20-x=16 in trial and error method
Answers
Answer:
Consider on your birthday you want to give your classmates chocolates. There are 40 students in your class other than you and you have 87 chocolates. If you give them two chocolates each, how many do you still have?
Let’s convert this statement into a mathematical equation. Let the number of remaining chocolates be x. You have given two chocolates to each student. Therefore, the number of chocolates distributed is 2 × 40 = 80.
Number of remaining chocolates = Number of total chocolates − Number of distributed chocolates.
⇒ x = 87 − 80 or, x = 7.
Converting Equation into Statement
Consider an equation, 3x − 5 = 17. The possible statement for this equation is 5 taken away from thrice of a number gives 17.
Solving an Equation
Solving an equation means to find the solution of the given equation. A simple equation has an equal (=) sign. This equality shows the balance of both the sides of the equation. The equation remains the same when the expressions
Answer:
-x=-4
Step-by-step explanation:
x=4
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