The number in front of the x is the slope of the line and the number added (or subtracted) to the x part is the y intercept. So this form of a line is called slope intercept form.
Start by plugging in zero for x, you get y=7 so put a dot at the point (0,7). Next plug in one for x, you get y=-3(1)+7 which is 4 so put a dot at the point (1,4). You can continue to plot points , and connecting them with a line when you see the pattern.
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4x plus 7 plus 3x equals 19 plus xx = 2
3x + y = 7 First, turn the equation into the slope-intercept form, y = mx + b, where m is the slope of the graph that that equation represents (solve for y).3x + y = 7 subtract 3x to both sidesy = -3x + 7So you clearly see that the slope is -3.
3x + 2y = 7
In the equation 3x plus 7 equals 13, x is equal to 2.