By the equation: 7.8x-2.4x = 1.08, 2x-2.8 times 0.5 = 8.96, 2 times (x + 1) = 6

By the equation: 7.8x-2.4x = 1.08, 2x-2.8 times 0.5 = 8.96, 2 times (x + 1) = 6

Given that the two solutions of the equation AX + by = 10 are x = 0, y = - 10 and x = 4, y = - 8, then the equation is
Math master, please come in, help, thank you

Replace the first group of solutions x = 0, y = - 10 into the original equation
The solution is b = - 1
Then the second group solution x = 4, y = - 8 is substituted into the equation ax-y = 10
The solution is a = 1 / 2
So the equation is (1 / 2) X-Y = 10

It is known that the system of equations y = 2, x = 1 is a solution of the square + | ax-by + 8 | = 0 of the equation (AX + by-12) about X and y, and the values of a and B are obtained
Urgent ah. Help Ha help.. reward score is not much. In the future to make up oh
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When {x = 0, y = - 2 {x = 4, y = 1 are solutions of the equation AX + by = 8, a=------

That is, 0-2b = 8
4a+b=8
So B = - 4
So 4a-4 = 8
4a=12
a=3