2(x+18)+2x=76
2x+36+2x-76=0
4x+36-76=0
4x=-36+76
4x=40
x=40/4
x=10
10+18=28
28+10=38
38+38=76
base=28
altura=10
espero y te sirva
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Verified answer
2(x+18)+2x=76
2x+36+2x-76=0
4x+36-76=0
4x=-36+76
4x=40
x=40/4
x=10
10+18=28
28+10=38
38+38=76
base=28
altura=10
espero y te sirva