X*40=Y, Y*0.21=Z, Y-Z=291. Find X.
Round up to the nearest one hundredth (0.00)
Round up to the nearest one hundredth (0.00)
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You have three equations:
40x = y
0.21y = z
y - z = 291
Since the 2nd two equations are y and z only, let's ignore the first one for now. We not have 2 equations and 2 unknowns, so we can solve for y and z.
We already have z in terms of y in equation 2, so let's plug that into z in equation 3 to solve for y.
y - z = 291
y - 0.21y = 291
0.69y = 291
y = 291 / 0.69
y = 421.74
Since we don't need z to find x, we can skip solving for z. We have an equation with x and y in it, so plug in our y into that and solve for x:
40x = y
40x = 421.74
x = 421.74 / 40
x = 10.54
40x = y
0.21y = z
y - z = 291
Since the 2nd two equations are y and z only, let's ignore the first one for now. We not have 2 equations and 2 unknowns, so we can solve for y and z.
We already have z in terms of y in equation 2, so let's plug that into z in equation 3 to solve for y.
y - z = 291
y - 0.21y = 291
0.69y = 291
y = 291 / 0.69
y = 421.74
Since we don't need z to find x, we can skip solving for z. We have an equation with x and y in it, so plug in our y into that and solve for x:
40x = y
40x = 421.74
x = 421.74 / 40
x = 10.54
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O_0