I think you could do
(5+4)×2+6-(2×2)-1
Well the y-intercept is where a line crosses the y-axis
y=-4x-6
think of it as y=mx+b
m is always going to be your slope
b is always going to be your y-intercept
y-intercept of y=-4x-6
is -6
A = number of ants
w = number of worms
There are 20 more ants than worms.
⇒ a - 20 = w
There are 80 insects.
⇒ a + w = 80
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Solve for a and w :
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a -20 = w -------------- (1)
a + w = 80 -------------- (2)
Substitute equation (1) into (2) :
a + (a - 20) = 80
a + a - 20 = 80
2a - 20 = 80 // combine like terms
2a = 100 // add 20 to both sides
a = 50 // divide by 2 on both sides
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Sub a = 30 into equation (1) :
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a - 20 = w
50 - 20 = w
w = 30
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Find ants and worms :
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ants = a = 50
worms = w = 30
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Answer: There are 50 ants and 30 worms.
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Yes................................................