True. If you wanted to know what X was, you might have asked , but I will tell you anyway. 0
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5x + 4y = 204y = -5x + 20y = (-5/4)x + 5
It is a linear equation in the variable x. You can solve for x using algebra: -5x + 3 = -22 -5x = -25 -x = -5 x = 5
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 7-2=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
2x + 5x = 35 7x = 35 x = 35/7 x = 5
I x=5 and y=2, then (5x5)=25 plus (9x2)=18. 25+18=43