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N76 [4]
3 years ago
12

Please help it will be brainlist as long as it’s right

Mathematics
2 answers:
Nana76 [90]3 years ago
8 0

Answer:

x = 5

Step-by-step explanation:

The 2 triangles are similar by the AA postulate then the ratios of corresponding sides are equal , that is

\frac{x+x+10}{30+10} = \frac{x+10}{30}

\frac{2x+10}{40} = \frac{x+10}{30} ( cross- multiply )

30(2x + 10) = 40(x + 10) ← distribute parenthesis on both sides

60x + 300 = 40x + 400 ( subtract 40x from both sides )

20x + 300 = 400 ( subtract 300 from both sides )

20x = 100 ( divide both sides by 20 )

x = 5

luda_lava [24]3 years ago
7 0

Answer:

x is 20

Step-by-step explanation:

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