Dwayne's garden is triangle-shaped with two equal sides and a third side that is 4 ft more than the length of an equal side. if the perimeter is 49 ft, how long is each side?

which equation represents this?

2x = 49
2x + 4 = 49
3x = 49
3x + 4 = 49

The perimeter of a figure is the sum of the measures of all its sides. Let x be the measure of the two equal side. Then, the third side becomes x+4. The equation that represents this is,
                                    x + x + (x + 4) = 49
Simplifying this would give an answer of,
                                        3x + 4 = 49
This is the fourth choice of letter D. 

The answer is 41.7 because 1.39 times 30 is 41.7