Ответ:
5(х + 3) = 10
х+3=2
х=2-3
×=-1
5(-1+3)=10
5(2х + 1) – 3х = 45 - х.
10х+5-3х=45-х
7х+5=45-х
7х+х=45-5
8х=40
х=5
5(2×5+1)-3×5=45-5
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Ответ:
5(х + 3) = 10
х+3=2
х=2-3
×=-1
5(-1+3)=10
5(2х + 1) – 3х = 45 - х.
10х+5-3х=45-х
7х+5=45-х
7х+х=45-5
8х=40
х=5
5(2×5+1)-3×5=45-5