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Solve 2x+y=3 x+y=5 in substitution method

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe