Answer:
A
Step-by-step explanation:
4x +3y = 7.43
5x +2y = 7.03
8x +6y = 14.86
-15x -6y = -21.09
-7x = -6.23
x = 0.89
The answer is A
Answer:
x = -1
Step-by-step explanation:
<em><u>Add like terms (3 and 7, 2x and -10x and -x)</u></em>
x + 3 + 7 = 2x - 10x - x
x + 10 = -9x
<em><u>Subtract x from both sides:</u></em>
10 = -10x
<em><u>Divide both sides by -10:</u></em>
-1 = x