Question

Given x=-10.

Answer 1

Using mathematical operations to evaluate the equations, the only equation that fits is m/10 + 4.7 = 3.7

Evaluating an Equation

An expression is an algebraic statement that is made up of constant, variables etc. An equation on the other hand is two equal expression often times, there's are unknown variables which the values makes them equal to one another.

In this problem, we have to plug the value of m = 10 in all equations and see which fits, or we can simply just solve for m

a) 5m + 5 = -40

5m = -40 - 5

5m = -45

m = -9

This does not fit

b) m/10 + 4.7 = 3.7

multiply through by 10

m + 47 = 37

m = 37 - 47

m = -10

The equation is true.

c)  m / 2 + 21 = 15

collect like terms

m / 2 = 15 - 21

m / 2 = -6

m = -12

This is false

d)

-49 + 3m = 72

3m = 72 + 49

3m = 121

m = 40.3

This is not true

Only m /10 + 4.7 = 3.7 is true for m = -10

Learn more on evaluating equation here;

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