10x+5y = 25
5y = -10x+25
y = -2x+5
Therefore: the slope is -2 and the intercept is 5
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When x = -5
10x + 3 = 15 10x = 15 - 3 10x = 12 x = 1.2
y=-10x-4
10x + 13 = 17 ie 10x = 17 - 13 so x = 4/10 = 0.4
7x2-10x+3=0 (7x-3)(x-1)=0