y = 1/2x - 7
а) х=4 у=?
у=1/2*4-7
у=2-7
у=-5
б) у=-8 х=?
-8=1/2х-7
-1=1/2х
х=-2
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y = 1/2x - 7
а) х=4 у=?
у=1/2*4-7
у=2-7
у=-5
б) у=-8 х=?
-8=1/2х-7
-1=1/2х
х=-2