This is your Answer...
<em>Hope</em><em> it</em><em> helps</em><em> you</em><em>.</em><em>.</em><em>.</em><em> </em><em>pls</em><em> mark</em><em> brainliest</em>
3x+2y=50
x+y=19
x=12, y=7
12 jumps, 7 "raise the roof"s
4x + 9 = 2x - 1
4x - 2x = -1 - 9
2x = -10
x = -10/2
x = -5 <===
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Just add them all up that’s it and you will get 20